ORP Redox Meter -1999~1999mV Oxidation Reduction Potential Tester with 256mV ORP Calibration Buffer for Water Testing, Aquarium, Research Laboratory (ORP-228 Meter+Calibration Powder) ORP-228 Meter+Calibration Powder industrial EASY TO USE It is Size:1.625 inches
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Ships within 48 hours · Estimated delivery Oct 30 - Nov 4