ITEM NAME:50Pcs 5in1 pool spa water test strips chlorine bromine PH alkalinity hardnessLJ Feature: High precision. Quickly test the PH, residual chlorine, bromine, total chlorine, total alkalinity and total hardness in water by colorimetric method. Convenient to use. Used in swimming pools, spas and other industries. Specification: Brand new Total Hardness: 0 ~ 100 Total Chlorine Range: 0~10 Free Chlorine Range: 0 ~ 10 Free Bromine Range: 0~22 PH Range: 6.8 ~ 8.4 Total Alkalinity: 0 ~ 240 Quantity: 50pcs/box Package included: 50pcs x Water Test Strips Note: Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same..Total Alkalinity: 0 ~ 240. Free Bromine Range: 0~22. Total Chlorine Range: 0~10. Free Chlorine Range: 0 ~ 10. PH Range: 6.8 ~ 8.4. Total Hardness: 0 ~ 100. High precision.