* 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, 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, plus one refill roll* Each tester furnishes test paper for well over 200 tests