PH TEST PAPER PH 10.0-12.0 RL REF,Pack of 5

Details

Hydrion Ph 10.0-12.0 Paper Refills 5Rolls/Pk^ short range ph (10.0-12.0) paper showing a sharp color change for each half ph unit. 15 foot rolls of ph paper with 2 color charts. For standard single and double roll dispensers. Pkd in heat sealed aluminum foil and tightly secured in a plastic case.