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pH Buffer Calibration Solution Kit 2-Pack — one pH 4.00 (red) and one pH 7.00 (Yellow) Each 500 mL (1.06 Pint) — NIST Traceable Reference Standards for All pH Meters
$39.20
- Color Coded for Easy Identification - Individually Bagged 500 ml (16.9 fl oz) Poly Bottles - Lot Numbered and Expiration Dated - Free Certificate of Analysis and Traceability - For Pharmaceutical, Academic, Research and Industrial Uses