Description Features: Upgrade 14 in 1: Test Total Alkalinity, pH, Hardness, Lead, Copper, Iron, Mercury, Chromium/Chromium(VI), Bromine, Nitrate, Nitrite, Free Chlorine, Fluoride, Sulfite Health: Test strips for drinking water, faucet, well water, fresh water tanks and more water quality testing. Use professional healthy drinking water test strips to test water quality standards. EASY TO USE: Immerse the drinking water test strip in water for 5 seconds, hold it in the air for about 30 seconds, then adjust the color of the back of the bottle to get a reading. Drinking water test strips are easy to use even for beginners. Eco-friendly: Made of eco-friendly PET material Easy to carry: About 14cm long and about 7oz in weight, easy to carry. How to use: 1. Immerse the test strip in water for 5 seconds. 2. Remove and wait 30 seconds. 3. Compare the drinking water test strip to the color chart on the bottle. Tips: Keep away from light and moisture. After removing the strap, quickly close the lid. Do not remove disinfectant Do not touch the test area of the reagent strip. Specification: Packing List: 50pcs X Drinking Water Test Strips