Hydrion Insta-Chek Wide Range pH Paper, the ultimate in wide range, general purpose pH papers has a distinct color match at each full pH unit:[0.0][1.0][2.0][3.0][4.0][5.0][6.0][7.0][8.0][9.0][10.0][11.0][12.0][13.0].

Hydrion Jumbo Insta-Chek Wide Range pH Paper consists of a .5"" by 600"" roll of pH paper, packed in a plastic dispenser with an extra large color chart for easy color matching. Provides for approximately 150 tests.