Hydrometer Determines Proof of Ethyl Alcohol in Spirits
It's easier than ever to check for ethyl alcohol with the Alcohol-Proof Hydrometer. Calibrated for proof at 60°F. Hydrometer is 12"L (305mm) with 0.2° divisions. Made according to the Bureau of Internal Revenue, U.S. Treasury Department. The tolerances listed are those outlined in Circular 555 of the National Bureau of Standards, Testing of Hydrometers. Hydrometer is wrapped in paper and individually packed in boxes. 185–206% proof range. IRS Code: R.