Test Strip, Test Form Strip, Overall Length 5 in, Test Type Test Strips, Testing Parameter One Total Alkalinity, Total Hardness, Nitrate, Nitrite, pH, Overall Width 1/4 in, Parameter Measurements Included 0 to 10 ppm Nitrite, 0 to 180 ppm Total Hardness, 0 to 200 ppm Nitrate, 0 to 240 ppm Total Alkalinity, 6 to 9 pH, Number of Tests 25, pH Resolution 0.5 pH, Test Detects For Alkalinity, Nitrate, Nitrite, pH, Total Hardness, Includes Color Chart Label