Hydrion 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].
Each carton contains 10 kits, each consisting of 2, 15-foot rolsl of test paper and 2, matching color charts. Each kit provides enough paper for approximately 200 tests. A carton of 10 provides approximately 2,000 tests.