Insta-test 5 water test strip measures free chlorine 0-10 ppm, bromine 0-20 ppm, total chlorine 0-10 ppm * Also measures Total Alkalinity 0-240 ppm, pH 6.2-9.0 and Total Hardness 0-800 ppm * This test strip is a dip-n-read strip with instant results * It is designed for stable color development to allow adequate time for the user to match very distinct colors * Each bottle includes 50 test strips packaged in a waterproof Pop-top bottle with hinged cap