Intex Test Strips Pack Includes 4-Way Test Kit and Copper Test Kit (20) 4-Way Test Strips Free Chlorine (0-10 ppm) and pH (6.2-8.4) Total Alkalinity (40-240 ppm) Calcium Hardness (0-1000 ppm) (20) Copper Test Strips. Copper (0-1.3 ppm)