Micro Essential Lab 51 Hydrion Wide Range pH Test Paper Dispenser, 1 - 11 pH, Single Roll Wide range; pH 1-11 Vivid Plastic case; holds a single 15ft roll of pH paper pH color chart is printed on the side of the dispenser Distinct color changes for each full pH unit Wide range; pH 1-11 Plastic case; holds a single 15ft roll of pH paper pH color chart is printed on the side of the dispenser Distinct color changes for each full pH unit