405 - Hydrion pH Test Paper Refills for Standard Single & Double Roll Dispensers | Accurate 0.5 pH Unit Color Change | Micro Essential Lab | Case of 50 | Ideal for Water Testing, Aquariums, Pools & Science Labs

" Hydrion pH test paper refills are used for Hydrion dispensers. -Ideal for double-roll and single-roll dispensers -Standard-size rolls: 4.6 m x 0.53 cm Come in pack of five rolls -each pack is a tightly sealed plastic container, complete with two color charts. Includes colorimetric chart."

pH Test Paper, For Standard Single and Double Roll Dispensers, Sharp Color Change for Each Half pH Unit

0 to 3.0

Packed in Heat Sealed Aluminum Foil and Tightly Secured in a Plastic Case