Dip & Read Rain Survey Kit pH 3-6, 100 envelopes - Single Unit

Simply dip the pH paper and match with the color chart. Covers the pH range 3.0-6.0 in steps of 1/2 unit. Inexpensive, convenient, and fast. This kit includes ONE-HUNDRED 2" x 2" ENVELOPES each containing 12 strips of paper and a matching color chart. Ideal for classroom and field studies.