Test Strip, Test Form Strip, Overall Length 5 in, Test Type Test Strips, Testing Parameter One Free Chlorine, Nitrate, Nitrite, pH, Total Chlorine, Total Hardness, Overall Width 1/4 in, Parameter Measurements Included 0 to 10 ppm Free Chlorine, 0 to 10 ppm Nitrite, 0 to 10 ppm Total Chlorine, 0 to 400 ppm Total Hardness, 0 to 50 ppm Nitrate, 4 to 10 pH, Number of Tests 25, pH Resolution 1.0 pH, Test Detects For Free Chlorine, Hardness, Nitrate, Nitrite, pH, Total Chlorine