Alcohol Hydrometer 30 to 40 % / 60 to 80 Proof IRS I

IRS I % Alcohol / Proof hydrometer this hydrometer is calibrated to show the percent of alcohol by volume @ 60 °F.IRS Alcohol Hydrometers comply with IRS specificationsEach hydrometer is accompanied by a certificate of calibration stating that the instrument meets or exceeds the tolerances of accuracy and physical specifications set forth by the National Institute of Standards and Technology, American Society for Testing and Materials, American Petroleum Institute, and Military STD-45662A Specifications IRS Size I % Alcohol Range 30 to 40% Proof Range 60 to 80 Subdivision 0.2% Tolerance +/- 0.4% Length 310 mm / 12.20" The 450 mL hydrometer jar should be used with this instrument