Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si [16-in-1 Water Test Strips]: Drinking water test kit helps you test water hardness, free chlorine, iron, copper, lead, nitrate, nitrite, , total chlorine, fluoride, cyanuric acid, chlorination 16 elements including ammonium, bromine, total alkalinity, carbonate, pH value, etc. Home water quality test kit tests with medical-grade accuracy to water quality and safety. [Quick and Accurate]: The drinking water test kit provides fast, accurate and reliable results in just 3 steps. Dip the test paper into the water for 2 seconds. Take it off and hold it horizontally for . Compare with the color chart on the bottle to get an accurate guide, clear water quality test results in . Conducting drinking water testing has never been easier, saving you time and money on lengthy trips to the lab. [Wide Scope of Application]: The water testing kit tests drinking water as well as water quality testing for swimming pools,ponds,household water,aquariums,spas,kitchens,hot tubs,,industrial wastewater,etc.Our water test strips are designed to test water quality, with an EPA-compliant water test strip kit that can be used for water testing ,in the lab,or in school.For the health of you and your family,please use professional water quality test strips to test water quality standards. [Usage Tips]: 1. Place the water quality test strip in the bottle after use to avoid ineffectiveness after long-term storage. Keep lid tightly closed between uses 2. Store in a cool dry place from moisture 3. Avoid light and moisture 4. Do not remove desiccant pack 5. Drinking water test kit is valid for 2 years from date of manufacture (see bottom of ). Please use test strips within 90 days of opening. Colour:As Shown Material:Paper Package Contents: 1set * fluoride test kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.