Calibration Solution | 250ml 7.0 + 4.0

Calibration Solution | 250ml 7.0 + 4.0

Regular price
$19.95 USD
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$19.95 USD
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This bundle comes with the following:

 1 - 250ml 7.0 buffer solution

1 - 250ml 4.0 buffer solution

Solution is compatible with any digital pH pen that calibrates to 7.0 and 4.0.

Ingredients: Potassium Hydrogen Phthalate