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Hydrometer, ASTM 36H, 75/81, API, Glass Formerly P
HB Instruments Hydrometer, API ASTM, 75 to 81° Range, 0.1 Division, 163mm L, ASTM No. 36H, 0.2° Accuracy, 60°F Standardizing Temperature, Conform to the Accuracy Requirements for ASTM Hydrometers, Individually Serialized, Feature Metal Ballast, Include Multi-language Statement of Accuracy, Tested and Calibrated in Exclusive Triple Accredited/Registered ISO/IEC 17025:2005, A2LA Accredited Laboratory Against Equipment whose Calibration is Traceable to NIST and DAkkS - BEL