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Hydrion* Insta-Chek* 0 - 13
14 colors with one paper for 14 pH values. Just one dip determines any pH from 0 to 13. This direct reading pH paper has the widest range available in a single paper. It produces a simple, single color match for all pH values with distinct and easy-to-read color separations. Insta-Chek renders immediate and accurate reproducible readings in bright colors that last. Choose from three different widths.