This Hydrion 1.0-11.0 Jumbo Size ph paper is easier to read with larger color charts. The .5"" width of the paper enables clearer and quicker color matching.
Hydrion Jumbo 0.0-13.0 pH paper has a distinct color match at each 1 pH unit:[1.0][2.0][3.0][4.0]5.0][6.0][7.0][8.0][9.0][10.0]11.0].
Hydrion Jumbo pH Paper consists of a .5" by 50' roll of pH paper, packed in a plastic dispenser with an extra large color chart for easy color matching. Provides for approximately 300 tests.
Warning: 
This product can expose you to Phenolphthalein, which is known to the State of California to cause cancer. For more information go to www.P65warnings.ca.gov