Features: 14 Heat 1 Upgrade: Test the total alkali, pH, hardness, lead, copper, iron, mercury, chromium / chromium (VI), bromine, nitrate, nitrite, residual chloride, fluoride, sub Sulfate health: test strips for drinking water, faucet, well water, fresh water tank and more water quality test. Test water quality standards using professional health drinking water test paper. Easy to use: Immerse drinking water test paper in water for 5 seconds, keeping for about 30 seconds in air, then adjusting the bottle back color to get readings. Even for beginners, drinking water test strips is also easy to use. Environmental Protection: It is convenient to carry it from environmentally friendly PET materials: about 14 cm long, with a weight of about 7 ounces, easy to carry. How to use: 1. Immerse test strips in water for 5 seconds. 2. Take it and wait for 30 seconds. 3. Compare the drinking water test paper with the color card on the bottle. Tips: Stay away from light and moist. After removing the strap, quickly cover the cover. Do not remove disinfectants Do not touch the test area of the reagent strip. Specifications: Packing List: 100 pieces of x drinking water test strips.