Feature:1. 14 in 1 upgrade: check total alkalinity, pH, hardness, lead, copper, iron, mercury, chromium/chromium (VI), bromine, nitrate, nitrite, residual chlorine, fluoride, sulfite2. Health: test strips are used for drinking water, faucets, wells, fresh water granules and more water quality tests. Use professional drinking water test strips for health to test water quality standards.3. Easy to Use: Drinking dip test water paper to water for 5 seconds, keep it in the air for about 30 seconds, and then adjust the color of the back of the bottle to get the reading. Even for beginners, the drinking test water strips are easy to use.4. Environmental protection: the water quality should be tested weekly. The package of our test strips contains 100 drinking water test strips.5. Easy to carry, guaranteed: 14x4cm size, 7oz weight, easy to carry. Ask a questionDrinking water quality can be found in the essieny test paper in just 35 seconds. Drinking water is essential in our lives! Contaminated water sources can cause many health problems, so it's important to test the quality of your drinking water regularly. Easy to use1. Immerse the indicator paper 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. Package List:1 Drinking Pack Water Test Strips (50pcs)1) We accept Alipay, West Union, TT. All major credit cards are accepted through the payment processor's secure escrow.2) payment must be made within 3 days of placing the order.1.