Specification: Material: Pet Dimensions: 9.7 X 3.5 Cm Test Time: 60 S Test Items: Total Chlorine, Residual Chlorine/bromine, Ph, Total Alkali, Hardness, Cyanuric Acid Each Test Strip Can Be Tested At The Same Time (6 In 1) Total Chlorine: 0-10 Free Chlorine, Bromine: 0-10 Ph Value: 6.8-8.4 Total Alkalinity: 0A??40 Total Hardness: 0A??000 Cyanuric Acid; 0-240 Each Test Strip Can Be Tested At The Same Time (3 In 1) Total Chlorine Test Range: 0-1-3-5-10 Ph Test Range: 6.8-7.2-7.4-7.6-8.0-8.4 Total Alkalinity Test Range: 0-40-80-120-180-240 Notes: 1.due To The Difference Between Different Monitors, The Picture May Not Reflect The Actual Color Of The Item. 2.please Allow Slight Dimension Difference Due To Different Manual Measurement. Thank You For Your Understanding. Feature: 1.upgrade 6-in-1: Test Ph Value, Total Chlorine, Free Chlorine, Total Alkalinity, Cyanuric Acid, Total Hardness At The Same Time, More Powerful Than 5-way Or 4-way Swimming Pool Test Strip And Liquid Test Kit 2.17s Test: Immerse The Swimming Pool Test Strip In Water For 2 Seconds, Let It Stand In The Air For About 15 Seconds, And Then Match The Color Of The Test Strip To The Back Of The Bottle To Obtain A Reading. It Only Takes 17s. Swimming Pool Test Strips Are Easy To Use, Even For Beginners 3.economy: The Swimming Pool Water Quality Should Be Tested Once A Week. Our Pack Of Test Strips Includes 50 Swimming Pool Test Strips And 5 Separate Moisture-proof Packaging That Are Well-sealed To Ensure Long-term Storage 4.essential For Swimming Pools And Hot Springs: The Test Strips Are Used To Test The Water Quality Of Swimming Pools, Hot Springs, And Hot Tubs To Ensure That The Appropriate Amount Of Chemical Substances Are Maint