Description： 1.HIGHLY PRECISION POOL TEST STRIPS for your swimming pool and spa. Tests for 7 parameters: total chlorine, free chlorine, bromine, pH, total alkalinity, cyanuric acid (stabilizer) and total hardness 2.EXTREMELY EASY TO USE pool water test strips. Instant reliable results with simple and clear instructions. Simply dip and compare with large color chart on bottle. Ideal range marked on bottle 3.SIMPLE, FAST, AND ACCURATE results in seconds, no assembly required, no water to collect, and by not having to count reagent drops, for technical and non technical users alike, works great 4. EASY TO STORE Strips are sealed well with 5 individual moisture-proof packages, plus an individually packed desiccant for dual protection from moisture OVER 20 YEARS OF TRUSTED MANUFACTURE QUALITY dedicated to help maintain a healthy pool and spa, ensure the pool chemicals and water treatment system for the home domestic water are in spec Infomation: Material:Paper Model:5 in 1 or 6 in 1 Quantity:50 Strips/Bottle Total Chlorine Test Range:0~10ppm Free Chlorine Test Range:0~10ppm PH Test Range:6.8~8.4 Total Alkalinity Test Range:0~240ppm Total Hardness Test Range:0~1000 Cyan-uric Acid Test Range:0~240 Always check to be safe,Easiest way to check chemicals. Package included:50Pcs/Set Swimming Pool Test Strips Note: 1.1 inch=2.54cm 2.Please allow 1-3 cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Designed for testing Free Chlorine, Total Chlorine, pH, Total Alkalinity, Total Hardness and Cyanuric acid Portable and convenient, easy to use High precision and easy operation Water testing for swimming pools or spa pools Can test effective chlorine, pH, total hardness