Sold as Two Packs of pH Strips, Strips Total; pH Full Range Test Strips; pH Color Chart Intervals: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14; Size.
Litmus pH Test Strips | (pH ), Universal Indicator, 2 Packs of Strips. Test and Track Your Water, Diet, Saliva, Pool, Aquarium, Urine, and Soil.
for that case, and in a box of strips. pH test strips, which have small squares of paper, each prepared with a different indicator, are also available. Ahlstrom.