Micro Essential Lab 54 Hydrion Wide Range pH Test Paper Dispenser, 3 - 9 pH, Single Roll Wide range; pH 3-9 Single roll dispenser; plastic case Accommodates a 15ft roll of paper, as selected Paper shows a distinct change for each full pH unit pH color chart is printed on the side of the case Wide range; pH 3-9 Accommodates a 15ft roll of paper, as selected Paper shows a distinct change for each full pH unit pH color chart is printed on the side of the case