[EPA LEVEL DETECTION] water strip is designed and manufactured with reference to EPA standards. Each of tests can detect pollutants at EPA level. [16-in-1 water quality kit] The water quality strip is equipped with 16 main functions, including PH value, hardness, lead, iron, copper, mercury, alkalinity, nitrite, nitrate, bromine, free chlorine, chlorine, fluorine, chromium/chromium, carbonate, cyanuric acid, covering the main factors affecting the quality of swimming pools, hot baths or drinking water. [Accurate and scientific water quality strip] has been committed to of testing and measurement for many years, and has adopted the most strip on products to the accuracy of water quality testing. The water quality measurement kit has been used in scientific education. [Save your money] - The pool strip contains 100 strips for 100 tests. If you twice a week, the will last for 6 months. Because of convenient operation, it also saves time. [Widely used water kit] 16-in-1 water strip can be applied to a wide range of water detection, such as drinking water, swimming pool, hot tub, spa, pond, aquarium, industrial wastewater, etc. Material: paper Color: as shown Package Contents: 100 x strips 1 x tube 1 x dropper 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.