Micro Essential CM 240 Chlorine Tester Roll (SET OF 10 PER CASE) Dust Pans & Sweepers *Typically English *Typically English golden delicious type flavor it produces an immediate color reaction* Color is matched at to the color chart for a reading* The match points chart indicate 10 50 100 200 ppm of free available chlorine* The Micro Chlorine Tester contains a dispenser with color chart and a 15' X 5 32" roll of test paper * Made with improved paper that gives instant readings with chlorine sanitizing solutions* Convenient Hydrion Dispenser that protects the paper and allows you to tear off strips of any desired length* When dipped into the solution