This pH test kit Hydrion includes a Pape pH test roller.

This 2.0-10.0 roller has match points of [2.0] [4.0] [6.0] [8.0] [10.0]

Each box contains 10 kits, each composed of a 15-foot roll of reactive paper and a matching color chart. Each kit provides enough paper for approximately 100 tests. A box of 10 boxes allows approximately 1,000 tests to be carried out.