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STOPPER, PENNY HEAD, HOLLOW. Joint size: 14/20.

STOPPER, PENNY HEAD, HOLLOW. Joint size: 19/22.

STOPPER, PENNY HEAD, HOLLOW. Joint size: 29/26. Hollow stopper with closed bottom.

STOPPER, FLUOROPOLYMER RESIN. Joint size: 24/40. Hollow fluoropolymer resin stopper.

STOPPER, FLUOROPOLYMER RESIN. Joint size: 29/42. Hollow fluoropolymer resin stopper.

STOPPER, FLUOROPOLYMER RESIN. Joint size: 45/50. Hollow fluoropolymer resin stopper.

STOPPER, FLUOROPOLYMER RESIN. Joint size: 14/20. Hollow fluoropolymer resin stopper.

STOPPER, FLUOROPOLYMER RESIN. Joint size: 19/22. Hollow fluoropolymer resin stopper.

STOPPER, CYLINDRICAL, ECONOMY. Joint size: 24/40. For use in standard taper outer joints. Economy style with open bottom.

PILOT PLANT REACTOR, 10 LITER JACKETED. Stopper, 24/40.

STOPPER, HEX HEAD, HOLLOW. Joint size: 14/20. Hexagonal shape head of stopper prevents it from rolling off of the bench top. Flat surface will also permit stopper to be inverted and placed on end, thereby preventing possible contamination of ground surface.

STOPPER, CAP STYLE. Joint size: 24/40. Cap style stopper for use with inner joints.

STOPPER, CAP STYLE. Joint size: 14/20. Cap style stopper for use with inner joints.

STOPPER, SPHERICAL, CAP TYPE. Spherical Size: 28. Cap style stopper for use with apparatus having a spherical ball joint. For clamp see CG-150.

STOPPER, FLASK LENGTH, FLATHEAD. Joint size: 1/13. Flat head design allows stopper to be inverted and placed on end thereby preventing contamination of the ground surface.

STOPPER, FLASK LENGTH, FLATHEAD. Joint size: 1/16. Flat head design allows stopper to be inverted and placed on end thereby preventing contamination of the ground surface.

STOPPER, FLASK LENGTH, PENNYHEAD. Joint size: 1/9. All sizes are solid with the exception of the #38 (CG-3018-08) which is hollow.

STOPPER, FLASK LENGTH, PENNYHEAD. Joint size: 1/13. All sizes are solid with the exception of the #38 (CG-3018-08) which is hollow.

STOPPER, FLASK LENGTH, PENNYHEAD. Joint size: 1/16. All sizes are solid with the exception of the #38 (CG-3018-08) which is hollow.

STOPPER, FLASK LENGTH, PENNYHEAD. Joint size: 1/22. All sizes are solid with the exception of the #38 (CG-3018-08) which is hollow.

STOPPER, FLASK LENGTH, PENNYHEAD. Joint size: 1/27. All sizes are solid with the exception of the #38 (CG-3018-08) which is hollow.

STOPPER, FLASK LENGTH, PENNYHEAD. Joint size: 2/1. All sizes are solid with the exception of the #38 (CG-3018-08) which is hollow.

STOPPER, FLASK LENGTH, PENNYHEAD. Joint size: 2/7. All sizes are solid with the exception of the #38 (CG-3018-08) which is hollow.

STOPPER, SAFE-LAB, FLASK LENGTH, FLUOROPOLYMER RESIN. Joint size: 1/16. fluoropolymer resin Safe-Lab stopper has a polypropylene extraction nut permitting easy removal of the stopper from the flask. All sizes are solid.

STOPPER, SAFE-LAB, FLASK LENGTH, FLUOROPOLYMER RESIN. Joint size: 1/22. fluoropolymer resin Safe-Lab stopper has a polypropylene extraction nut permitting easy removal of the stopper from the flask. All sizes are solid.

STOPPER, SAFE-LAB, FLASK LENGTH, FLUOROPOLYMER RESIN. Joint size: 1/27. fluoropolymer resin Safe-Lab stopper has a polypropylene extraction nut permitting easy removal of the stopper from the flask. All sizes are solid.

STOPPER, SAFE-LAB, FLASK LENGTH, FLUOROPOLYMER RESIN. Joint size: 2/7. fluoropolymer resin Safe-Lab stopper has a polypropylene extraction nut permitting easy removal of the stopper from the flask. All sizes are solid.

STOPPER, FLUOROPOLYMER RESIN, FLASK LENGTH. Joint size: 1/9. fluoropolymer resin stopper for use in flask length outer joints.

STOPPER, FLUOROPOLYMER RESIN, FLASK LENGTH. Joint size: 1/13. fluoropolymer resin stopper for use in flask length outer joints.

STOPPER, FLUOROPOLYMER RESIN, FLASK LENGTH. Joint size: 1/16. fluoropolymer resin stopper for use in flask length outer joints.

STOPPER, FLUOROPOLYMER RESIN, FLASK LENGTH. Joint size: 1/19. fluoropolymer resin stopper for use in flask length outer joints.

STOPPER, FLUOROPOLYMER RESIN, FLASK LENGTH. Joint size: 1/22. fluoropolymer resin stopper for use in flask length outer joints.

STOPPER, FLUOROPOLYMER RESIN, FLASK LENGTH. Joint size: 1/27. fluoropolymer resin stopper for use in flask length outer joints.

STOPPER, FLUOROPOLYMER RESIN, FLASK LENGTH. Joint size: 2/7. fluoropolymer resin stopper for use in flask length outer joints.

STOPCOCK, STRAIGHT BORE, GLASS PLUG. Bore: 2mm; Plug Size: 12/30; Sidearm O.D; 8mm; Clip Size: #1. The 1mm through 6mm bore sizes are supplied complete with the listed size of CG-423 metal retaining clip.

STOPCOCK, STRAIGHT BORE, GLASS PLUG. Bore: 4mm; Plug Size: 17/40; Sidearm O.D; 10mm; Clip Size: #4. The 1mm through 6mm bore sizes are supplied complete with the listed size of CG-423 metal retaining clip.

STOPCOCK, STRAIGHT BORE, GLASS PLUG. Bore: 6mm; Plug Size: 20/44; Sidearm O.D; 12mm; Clip Size: #5. The 1mm through 6mm bore sizes are supplied complete with the listed size of CG-423 metal retaining clip.

STOPCOCK, STRAIGHT BORE, GLASS PLUG. Bore: 8mm; Plug Size: 25/52; Sidearm O.D; 16mm;. The 1mm through 6mm bore sizes are supplied complete with the listed size of CG-423 metal retaining clip.

STOPCOCK, STRAIGHT BORE, GLASS PLUG. Bore: 10mm; Plug Size: 35/56; Sidearm O.D; 19mm;. The 1mm through 6mm bore sizes are supplied complete with the listed size of CG-423 metal retaining clip.

Replacement Glass Stopcock for Separatory Funnel, Globe-Shape. 10mm. Large capacity separatory funnels with a choice of glass or fluoropolymer resin stopcocks. Stem length is approx. 130mm below the stopcock on all sizes. For replacement stoppers see CG-3018 for #38, CG-3000 for 45/50.

Replacement Glass Stopcock for Separatory Funnel, Globe-Shape. 8mm. Large capacity separatory funnels with a choice of glass or fluoropolymer resin stopcocks. Stem length is approx. 130mm below the stopcock on all sizes. For replacement stoppers see CG-3018 for #38, CG-3000 for 45/50.

Replacement Glass Stopcock for Addition Funnel. 6mm glass plug only. Cylindrical shape addition funnel with a standard taper top outer joint and lower inner joint, both being the same size. With pressure equalizing arm and glass stopcock.

Glass Stopcock for Distilling Head, Variable Reflux. Replacement Components. Replacement 4mm Glass Plug. The position of the cold finger condenser allows an adjustment of the reflux ration.

Replacement Glass Stopcock, 2mm. Adapter has a 2mm bore stopcock sealed to the side tube at a 75[degree] angle with a inner drip tip joint. With a 10/18 outer joint at the top of the vertical tube for use with 10/18, 25mm immersion thermometers.

STOPCOCK, STRAIGHT BORE, GLASS PLUG, 1-ARM LARGER. Bore: 2mm; Plug Size: 12/30; Sidearm O.D; 8&9mm; Clip Size: #1. Similar to CG-400 but with one arm of the stopcock being of a larger diameter. Larger arm facilitates construction of stronger apparatus such as separatory funnels, burets etc.

STOPCOCK, STRAIGHT BORE, GLASS PLUG, 1-ARM LARGER. Bore: 4mm Plug Size: 17/40; Sidearm O.D; 10&12; Clip Size: #4. Similar to CG-400 but with one arm of the stopcock being of a larger diameter. Larger arm facilitates construction of stronger apparatus such as separatory funnels, burets etc.

STOPCOCK, STRAIGHT BORE, GLASS PLUG, 1-ARM LARGER. Bore: 6mm; Plug Size: 20/44; Sidearm O.D; 12&16; Clip Size: #5. Similar to CG-400 but with one arm of the stopcock being of a larger diameter. Larger arm facilitates construction of stronger apparatus such as separatory funnels, burets etc.

STOPCOCK, STRAIGHT BORE, GLASS PLUG, CAPILLARY ARMS. Bore: 2mm; Plug Size: 12/30; Sidearm O.D; 7.5mm; Clip Size: #1. Similar to CG-400 but with the sidearms being made of capillary tubing having the same bore as the plug. Supplied complete with CG-423 metal retaining clip.

STOPCOCK, STRAIGHT BORE, GLASS PLUG, SCHLENK. Plug Style: Plain Snelling; Plug Size: 12/30; Bore: 2mm. This stopcock is especially designed for the repair of the sidearm on Schlenk vessels.

STOPCOCK, T-BORE, GLASS PLUG. Bore: 2mm; Plug Size: 12/30; Sidearm OD: 8mm; Clip Size: #1. Stopcock has three sidearms sealed 90[degree] apart. The solid glass plug has a 'T' shaped bore so that any two or all three sidearms can be connected at one time.

STOPCOCK, T-BORE, GLASS PLUG. Bore: 2mm; Plug Size: 17/40; Sidearm OD: 8mm; Clip Size: #1. Stopcock has three sidearms sealed 90[degree] apart. The solid glass plug has a 'T' shaped bore so that any two or all three sidearms can be connected at one time.

STOPCOCK, T-BORE, GLASS PLUG. Bore: 4mm; Plug Size: 17/40; Sidearm OD: 10mm; Clip Size: #4. Stopcock has three sidearms sealed 90[degree] apart. The solid glass plug has a 'T' shaped bore so that any two or all three sidearms can be connected at one time.

STOPCOCK, T-BORE, GLASS PLUG. Bore: 4mm; Plug Size: 20/44; Sidearm OD: 12mm; Clip Size: #4. Stopcock has three sidearms sealed 90[degree] apart. The solid glass plug has a 'T' shaped bore so that any two or all three sidearms can be connected at one time.

STOPCOCK, T-BORE, GLASS PLUG. Bore: 6mm; Plug Size: 20/44; Sidearm OD: 12mm; Clip Size: #5. Stopcock has three sidearms sealed 90[degree] apart. The solid glass plug has a 'T' shaped bore so that any two or all three sidearms can be connected at one time.

STOPCOCK, T-BORE, GLASS PLUG. Replacement Plug for CG-410 Stopcock. Bore Size: 6; Plug Size: 20/44. Stopcock has three sidearms sealed 90[degree] apart. The solid glass plug has a 'T' shaped bore so that any two or all three sidearms can be connected at one time.

STOPCOCK, T-BORE, GLASS PLUG. Replacement Plug for CG-410 Stopcock. Bore Size: 4; Plug Size: 20/44. Stopcock has three sidearms sealed 90[degree] apart. The solid glass plug has a 'T' shaped bore so that any two or all three sidearms can be connected at one time.

DISTILLING HEAD, VIGREUX, VACUUM JACKETED. Replacement Components. Replacement 4mm 'T'-Bore Glass Plug. Jacketed fractionation distilling head for use under vacuum. The 10/18 top outer joint is for a 1in. immersion thermometer while the 10/30 joints are for a 2in. immersion thermometer.

GAS MANIFOLD, 4-PLACE, GLASS STOPCOCKS. Replacement 2mm 'T'-Bore Glass Plug. Four port manifold with 2mm bore glass stopcocks on the ports. A 'T' -bore stopcock is located 100mm from the end of the manifold and 40mm from the first port.

DISTILLING HEAD, VIGREUX, VACUUM JACKETED. Replacement Components. Replacement 2mm 'T'-Bore Glass Plug. Jacketed fractionation distilling head for use under vacuum. The 10/18 top outer joint is for a 1in. immersion thermometer while the 10/30 joints are for a 2in. immersion thermometer.

STOPCOCK, DOUBLE OBLIQUE BORE, GLASS PLUG. Bore: 2mm; Plug Size: 14.5/50; Sidearm OD: 8mm; Clip Size: #1. Stopcock has a solid glass plug having parallel diagonal bores. Supplied with a CG-423 metal retaining device.

STOPCOCK, DOUBLE OBLIQUE BORE, GLASS PLUG. Bore: 4mm; Plug Size: 16.2/56; Sidearm OD: 10mm; Clip Size: #3. Stopcock has a solid glass plug having parallel diagonal bores. Supplied with a CG-423 metal retaining device.

STOPCOCK, STRAIGHT BORE, FLUOROPOLYMER RESIN. Bore Size: 1; Plug Size: 11/25; Sidearm OD: 7mm. Straight bore stopcock having a 1:5 taper solid fluoropolymer resin plug.

STOPCOCK, STRAIGHT BORE, FLUOROPOLYMER RESIN. Bore Size: 2; Plug Size: 11/25; Sidearm OD: 8mm. Straight bore stopcock having a 1:5 taper solid fluoropolymer resin plug.

STOPCOCK, STRAIGHT BORE, FLUOROPOLYMER RESIN. Bore Size: 3; Plug Size: 15.2/30; Sidearm OD: 10mm. Straight bore stopcock having a 1:5 taper solid fluoropolymer resin plug.

STOPCOCK, STRAIGHT BORE, FLUOROPOLYMER RESIN. Bore Size: 4; Plug Size: 15.2/30; Sidearm OD: 10mm. Straight bore stopcock having a 1:5 taper solid fluoropolymer resin plug.

STOPCOCK, STRAIGHT BORE, FLUOROPOLYMER RESIN. Bore Size: 6; Plug Size: 16/35; Sidearm OD: 12mm. Straight bore stopcock having a 1:5 taper solid fluoropolymer resin plug.

STOPCOCK, STRAIGHT BORE, FLUOROPOLYMER RESIN. Bore Size: 8; Plug Size: 24/40; Sidearm OD: 16mm. Straight bore stopcock having a 1:5 taper solid fluoropolymer resin plug.

STOPCOCK, STRAIGHT BORE, FLUOROPOLYMER RESIN. Bore Size: 10; Plug Size: 24/40; Sidearm OD: 16mm. Straight bore stopcock having a 1:5 taper solid fluoropolymer resin plug.

Replacement PTFE Stopcock for Separatory Funnel, Globe Shape. 10mm plug only. Large capacity funnels with choice of glass or fluoropolymer resin stopcocks. Stem length is approx. 130mm below stopcock on all sizes. For replacement stoppers see CG-3018 for #38, CG-3000 for 45/50.

LOWER COLUMN ASSEMBLY, LARGE DIAMETER, SEPARABLE, FLUOROPOLYMER RESIN STOPCOCK. Replacement fluoropolymer resin Plugs. Stopcock Bore: 6mm. Similar to CG-1172, but with addition of fluoropolymer resin stopcock to control of eluant. The CG-1175 camps used to connect lower assembly to column section.

LOWER COLUMN ASSEMBLY, LARGE DIAMETER, SEPARABLE, FLUOROPOLYMER RESIN STOPCOCK. Replacement fluoropolymer resin Plugs. Stopcock Bore: 6mm. Similar to CG-1172, but with addition of fluoropolymer resin stopcock to control of eluant. The CG-1175 camps used to connect lower assembly to column section.

Chromatography Column PTFE Stopcock. Replacement 4mm fluoropolymer resin Plug Only. General purpose gravity eluted column having fluoropolymer resin stopcock, reinforced beaded top. Column constructed of MEDIUM WALL TUBING. Glass wool (not supplied) used to support column packing.

STOPCOCK, STRAIGHT BORE, FLUOROPOLYMER RESIN. PLUG ONLY FOR CG-424 FLUOROPOLYMER RESIN STOPCOCKS. Bore Size: 3; Plug Size: 15.2/30. Straight bore stopcock having a 1:5 taper solid fluoropolymer resin plug.

STOPCOCK, STRAIGHT BORE, FLUOROPOLYMER RESIN. PLUG ONLY FOR CG-424 FLUOROPOLYMER RESIN STOPCOCKS. Bore Size: 1; Plug Size: 11/25. Straight bore stopcock having a 1:5 taper solid fluoropolymer resin plug.

STOPCOCK, STRAIGHT BORE, MICRO FLUOROPOLYMER RESIN. Bore: 1mm; Plug Size: 10/15; Sidearm OD: 5mm. Used in the fabrication of small scale apparatus, especially apparatus that has weight restrictions. fluoropolymer resin plug has a 1:5 taper.

STOPCOCK, STRAIGHT BORE, MICRO FLUOROPOLYMER RESIN. Replacement Plug for CG-425 Stopcock. Bore: 1mm; Plug Size: 10/15. Used in the fabrication of small scale apparatus, especially apparatus that has weight restrictions. fluoropolymer resin plug has a 1:5 taper.

STOPCOCK, GLASS SHELL ONLY, FOR FLUOROPOLYMER RESIN PLUG. Bore Size: 1, 1.5 & 2; Barrel Size: 11/25; Sidearm OD: 8mm. Glass portion only of CG-424. Accepts 1:5 taper fluoropolymer resin plugs.

STOPCOCK, GLASS SHELL ONLY, FOR FLUOROPOLYMER RESIN PLUG. Bore Size: 3 & 4; Barrel Size: 15.2/30; Sidearm OD: 10mm. Glass portion only of CG-424. Accepts 1:5 taper fluoropolymer resin plugs.

STOPCOCK, GLASS SHELL ONLY, FOR FLUOROPOLYMER RESIN PLUG. Bore Size: 5 & 6; Barrel Size: 16/35; Sidearm OD: 12mm. Glass portion only of CG-424. Accepts 1:5 taper fluoropolymer resin plugs.

STOPCOCK, GLASS SHELL ONLY, FOR FLUOROPOLYMER RESIN PLUG. Bore Size: 8 & 10; Barrel Size: 24/40; Sidearm OD: 16mm. Glass portion only of CG-424. Accepts 1:5 taper fluoropolymer resin plugs.

STOPCOCK, STRAIGHT BORE 1-ARM LARGER, FLUOROPOLYMER RESIN. Complete with fluoropolymer resin Plug. Bore Size: 2; Plug Size: 11/25; Sidearm OD: 8&9mm. Similar to CG-424 but with one arm of stopcock being a larger diameter to facilitate construction of stronger apparatus like separatory funnels, etc.

STOPCOCK, STRAIGHT BORE 1-ARM LARGER, FLUOROPOLYMER RESIN. Complete with fluoropolymer resin Plug. Bore Size: 4; Plug Size: 15.2/30; Sidearm OD: 10&12mm. Similar to CG-424 but with one arm of the stopcock being of a larger diameter.

STOPCOCK, STRAIGHT BORE 1-ARM LARGER, FLUOROPOLYMER RESIN. Complete with fluoropolymer resin Plug. Bore Size: 6; Plug Size: 16/35; Sidearm OD: 11&12mm. Similar to CG-424 but with one arm of the stopcock being of a larger diameter.

STOPCOCK, STRAIGHT BORE 1-ARM LARGER, FLUOROPOLYMER RESIN. Glass Shell Only. Bore Size: 2; Plug Size: 11/25; Sidearm OD: 8&9mm. Similar to CG-424 but with one arm of stopcock being of a larger diameter. Larger arm facilitates construction of stronger apparatus such as separatory funnels, burets etc.

STOPCOCK, STRAIGHT BORE 1-ARM LARGER, FLUOROPOLYMER RESIN. Glass Shell Only. Bore Size: 4; Plug Size: 15.2/30; Sidearm OD: 10&12mm. Similar to CG-424 but with one arm of stopcock being a larger diameter. Larger arm facilitates construction of stronger apparatus like separatory funnels, burets etc.

STOPCOCK, STRAIGHT BORE 1-ARM LARGER, FLUOROPOLYMER RESIN. Glass Shell Only. Bore Size: 6; Plug Size: 16/35; Sidearm OD: 11&12mm. Similar to CG-424 but with one arm of stopcock being a larger diameter. Larger arm facilitates construction of stronger apparatus such as separatory funnels, burets etc.

STOPCOCK, STRAIGHT BORE, FLUOROPOLYMER RESIN, 1-ARM CAPILLARY. Bore Size: 2; Plug Size: 11/25; Sidearm OD: 7&8mm. Similar to CG-424, but with one arm being made of capillary tubing having a bore of 2mm.

STOPCOCK, STRAIGHT BORE, FLUOROPOLYMER RESIN, CAPILLARY ARMS. Bore: 2mm; Plug Size: 11/25; Sidearm OD: 7mm. Similar to CG-424, but with both arms being made of capillary tubing having a bore of 2mm.

STOPCOCK, STRAIGHT BORE, FLUOROPOLYMER RESIN, METERING. Bore Size: 2; Plug Size: 11/25; Sidearm OD: 8mm. A 1:5 taper fluoropolymer resin plug having a threaded needle valve allowing the adjustment of flow through the bore of the plug.

STOPCOCK, STRAIGHT BORE, FLUOROPOLYMER RESIN, METERING. Bore Size: 4; Plug Size: 15.2/30; Sidearm OD: 10mm. A 1:5 taper fluoropolymer resin plug having a threaded needle valve allowing the adjustment of flow through the bore of the plug.

STOPCOCK, FLUOROPOLYMER RESIN, T-BORE. Bore Size: 2; Plug Size: 15.2/30; Sidearm OD: 8mm. A: 1:5 taper fluoropolymer resin stopcock with three stems sealed 90[degree] apart. fluoropolymer resin plug has a 'T' shaped bore to connect any two or all three stems.

STOPCOCK, FLUOROPOLYMER RESIN, T-BORE. Bore Size: 4; Plug Size: 16/35; Sidearm OD: 10mm. A: 1:5 taper fluoropolymer resin stopcock with three stems sealed 90[degree] apart. fluoropolymer resin plug has a 'T' shaped bore to connect any two or all three stems.

STOPCOCK, FLUOROPOLYMER RESIN, T-BORE. Bore Size: 6; Plug Size: 24/40; Sidearm OD: 12mm. A: 1:5 taper fluoropolymer resin stopcock with three stems sealed 90[degree] apart. fluoropolymer resin plug has a 'T' shaped bore to connect any two or all three stems.

STOPCOCK, T-BORE, FLUOROPOLYMER RESIN, CAPILLARY ARMS. Bore Size: 2; Plug Size: 15.2/30; Sidearm OD: 7mm. Similar to CG-424, but with all three arms being made of capillary tubing having a bore of 2mm.

STOPCOCK, FLUOROPOLYMER RESIN, 120[degree] BORE. Bore Size: 2; Plug Size: 15.2/30; Sidearm OD: 8mm. A 1:5 taper fluoropolymer resin stopcock with three sidearms sealed 120[degree] apart. Plug has a bore to allow connection of any two arms at once.

STOPCOCK, FLUOROPOLYMER RESIN, 120[degree] BORE. Bore Size: 4; Plug Size: 16/35; Sidearm OD: 10mm. A 1:5 taper fluoropolymer resin stopcock with three sidearms sealed 120[degree] apart. Plug has a bore to allow connection of any two arms at once.

STOPCOCK, FLUOROPOLYMER RESIN, 120[degree] BORE. Replacement Plug for CG-440 Stopcock. Bore: 4mm; Plug Size: 16/35. A 1:5 taper fluoropolymer resin stopcock with three sidearms sealed 120[degree] apart. Plug has a bore to allow connection of any two arms at once.

DISTILLING RECEIVER, MOISTURE TEST. Replacement Components. Replacement 2mm 120[degree] fluoropolymer resin Plug. Modified Dean-Stark receiver designed for solvents that are either lighter or heavier than water.

STOPCOCK, FLUOROPOLYMER RESIN, FOUR WAY. Bore: 2mm; Plug Size: 15.2/30; Sidearm OD: 8mm. A 1:5 taper fluoropolymer resin plug having double 'V', 90 o bores to connect opposite sets of adjacent arms. Configuration of stopcock allows it to be used in a system to obtain reversal of flow.

STOPCOCK, FLUOROPOLYMER RESIN, DOUBLE OBLIQUE BORE. Bore Size: 2; Plug Size: 12.9/44; Sidearm OD: 8mm. A 1:5 taper fluoropolymer resin stopcock having two parallel diagonal bores.

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