This Hydrion jumbo size pH paper has a pH range of 3.0 to 5.5. Large size color charts make it easier to read. Dispenser contains one roll that is 1/2" wide and 600" long. This size makes for clearer and quicker color matching. This test paper is exactly the same as PH1300, except range is short for greater accuracy. Range: 3.0 to 5.5. Per each; 10/Carton. Micro Essential Lab #: HJ626.