[Double Roll Double Roll | 1 - 12 pH]
[Single Roll Single Roll | 1 - 12 pH]
[Double Roll 6 - 8 pH]
This Hydrion pH paper is in a single roll dispenser, and has a wide range from 1-12. It is in a plastic case which accommodates a single 15ft roll of paper, as selected. The Hydrion wide range papers show a distinct change for each full pH unit. The pH color chart is printed on the side of the case. Range: 1-12. 1 Roll/Dispenser; 10 Dispensers/Carton. Micro Essential Lab #: 50.