Micro Essential Hydrion Single Roll Vivid pH Paper Dispenser provides one 180 inch roll of pH paper contained in a protective plastic dispenser with a serrated edge for easy tear off of the desired paper length. Color changes are distinct and easily matched to the included color chart at each 0.5 pH unit. This dispenser has paper sufficient for at least 120 tests. Roll Length: 180 inches. pH Range: 4.5-8.5. Sold individually. Micro Essential Labs MIC-2210.