Specifications: 6 parameters of Pool chemical test for PH, Total Chlorine, Free Chlorine/Bromine, Total Alkalinity, Cyanuric Acid and Total Hardness. Immerse the test strip in water for 2 seconds, take it out and wait 15 seconds, then match the results with the detail color chart on the side of bottle to check the water quality. Highly recommend, total chlorine 0-1 ppm, pH 7.4-7.6, total alkalinity 80-120 ppm, cyanuric acid 30-50ppm and total hardness 250-500 ppm. Suitable for pool, spa, hot tub water quality test. Item Name: 6 in 1 Pool Test Strips Material: Paper Quantity: 50Pcs/Bottle Features: Portable, Easy to Use, High Precision, Universal Bottle Size: 3.75" x 1.38" x 1.38" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 Bottle of 6 in 1 Pool Test Strips (Total 50Pcs/Bottle)