Hydrion 1-12 pH Paper Refills. 5 rolls. Measures pH's 1-12. For Standard Size Single and Double Roll ...
Hydrion 1-12 pH Paper Refills. 5 rolls. Measures pH's 1-12. For Standard Size Single and Double Roll Dispensers. Refill Rolls are packed in heat sealed aluminum foil and tightly secured in a plastic case and includes two color charts. Shows distinct change for each full pH unit. Read more
