Specifications:6-in-1 swimming pool and hot spring water test strips.Test total chlorine, free chlorine, PH, total alkalinity, total hardness and cyanuric acid.Test twice at the pool twice a week for best results.A good way to easily understand your water quality in the key.Item Name: Pool Test StripsMaterial: PaperQuantity: 50Pcs/BottleTest Range:Total Chlorine: 0-10ppmFree Chlorine: 0-10ppmPH: 6.8-8.4Total Alkalinity: 0-240ppmTotal Hardness: 0-1000Cyanuric Acid: 0-240Bottle Size: Height: 3.9", Diameter: 1.6" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 Bottle of Pool Test Strips (50Pcs)