The DipCell Color Comparator displays Biguanide concentrations from 0 to 75 ppm, and pH levels from 6.8 to 8.2 for 50 tests. The DipCell, Biguanide and pH 15 mL test reagent bottles, and instructions are packaged in a hanging/free standing plastic clamshell. The Biguanide & pH Test Kits are packed individually or a 12-pack case.