Case of 24 - Calibration Solution | 250ml 7.0 + 4.0
$120.00
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This bundle comes with the following: 12 - 250ml 7.0 buffer solution 12 - 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
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