CM-240 Chlorine test paper measures the concentration of free chlorine in water and sanitising/disinfecting solutions. With color matches at 10-50-100-200ppm. Each kit consists of a 15 ft. x 5/32 in. roll of premium test paper in a handy plastic dispenser, with a matching color chart PLUS 1 refill roll of test paper. Approx 200 Tests per kit.