or
Hydrion pH (1.0-12.0) Paper Jumbo Refill 1 roll. pH range 1.0-12.0. Jumbo size 600 roll x 1/2 wide. Sharp color change for each full pH unit.
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Hydrion pH (1.0-12.0) Paper Jumbo Refill 1 roll. pH range 1.0-12.0. Jumbo size 600 roll x 1/2 wide. Sharp color change for each full pH unit.
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