Description: Water quality testing: 16 in 1 test strip total alkalinity, PH, Hardness, Iron, Copper, Mercury, Total Alkalinity, Nitrite, Nitrate,Bromine, Free Chlorine, Total Chlorine , Fluride, Chromium/Cr,Carbonate Root,Cyanuric acid, quick water quality testing, and results in seconds. Professional: High quality water quality testing, accurate color coordination, high sensitivity, using professional quality drinking water test strips to test water quality standards. Easy to use: Immerse the drinking water test strip in water for 2 seconds, hang it in the air for about 1 minute, and adjust the color of the bottle to read the reading. Easy to carry: 100 or 50 strips, test water quality once a week, drinking water test strips are easy to use even for beginners. Health: Test strips are suitable for testing of drinking water, aquariums, fish tanks, swimming pools and spas, industrial water, ponds, hot springs. Specification: Material: Paper Package Includes: 1 Bottle Test Strips