Pool and spa owners are always looking for something quick and easy. We guarantee you will love the convenience and simplicity of Insta-Test strips in pop-top vials. It's an unbeatable test system: no caps to worry about and even greater moisture protection. The colorful display tray lets the strips sell themselves. There are 25 test strips per bottle that test for, copper, pH, and total alkalinity. The strips measures copper 0 to 3.0 ppm, pH 6.8 to 8.4, and total alkalinity 0 to 180 ppm in 10 seconds.