3 PRECISION PROOF HYDROMETERS Overlapping proof ranges (0-110, 100-160, 160-200). These hydrometers have been perfectly calibrated @ 60°F and in accordance with N.I.S.T. Standards. Each kit includes a Certificate of Conformance which will appease most Quality Assurance Programs. (We offer certified hydrometers for an additional charge).
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HAND-MADE, PRO-GRADE & USA-MADE
Check out the pdf below for information on the use and care of your hydrometer(s):Specific Gravity Wine Distilled Spirits WEB