Pro Lab WQ105 Do-It-Yourself Water Quality Test Kit Professional Water Quality Test Kit, Accurate Instant Water Test Safe & Easy To Use, Checks For Toxins In Water Laboratory Grade Test Strips Moistened w/ Water Provide Effective & Reliable Results Possible Each Box Contains 18 Instant Test Strips That Can Perform 9 Different Tests Each Box Contains Enough Strips For Testing 2 Samples Of Each Test