H-B DURAC 40/60 Percent Alcohol Proof Ethyl Alcohol Hydrometer, Bel-Art, Mfr#: 618074400

Used to determine proof of ethyl alcohol spirits, these hydrometers are available in various ranges from 0 to 206%. 300mm 12 long lead free ballast and glass made according to the bureau of internal revenue, u.s. Treasury department, the tolerances listed for these hydrometers are those outlined in circular 555 of the national bureau of standards, testing of hydrometers individually serialized temperature standardization: 60°f 15°c hand inspected by our u.s. Quality team packaged with a multi-language english, french, german, italian, portuguese, and spanish statement of accuracy indicating accuracy traceable to nist note : hydrometers should be stored in a clean, dry, safe place, and should not be subjected to extreme temperatures.