Micro Essential Lab HJ633 Hydrion Short Range pH Test Paper Dispenser, 6.0 - 8.0 pH, Single Roll Jumbo Short range; pH 6.0 to 8.0 Single roll Jumbo size; easier to read Clearer and quicker matching Large size color charts Short range; pH 6.0 to 8.0 Jumbo size; easier to read Clearer and quicker matching Large size color charts