PAPER, PH INSTA-CHEK 0-13 (10/CS) Wide pH range: 0.0 to13.0 Distinct color match at each full pH unit Immediate response with accurate, reproducible readings Each kit consists of a 4.57m (15 ft.) long x 6.35mm (0.25 in.) wide roll of test paper (100 to 150 tests) For Classrooms, Hospital and general laboratories, Industrial testing, Food service, Safety/Emergency testing, Agriculture, in vitro testing