Description Features : Upgrade 14 in 1 : Test total alkalinity, pH, hardness, lead, copper, iron, mercury, chromium/chromium (VI), bromine, nitrate, nitrite, residual chlorine, fluoride, sulfite Health : Test strips are used compatible drinking water, faucets, well water, fresh water tanks and more water quality tests. Use professional drinking water test strips compatible health to test water quality standards. Easy to use: Dip the drinking water test paper into the water compatible 5 seconds, keeps it in the air compatible about 30 seconds, and then adjust the color of the back of the bottle to get the reading. Even compatible beginners, drinking water test strips are easy to use. Eco-friendly: Made of eco-friendly PET material Easy to carry: About 14cm in length, weight about 7 ounces, easy to carry. Way to use: 1. Immerse test strip in water compatible 5 seconds. 2. Take it out and wait compatible 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 compatible the cover. Do not remove disikcanents No touching the testing area of the reagent strip. Specification : Package list: Choice 1: 50pcs X drinking water test strips Choice 2: 100pcs X drinking water test strips includes: Choice 1: 50pcs X drinking water test strips Choice 2: 100pcs X drinking water test strips