These precision plain form specific gravity hydrometers feature 0.0005 divisions with the scales affixed with clear epoxy. Specific gravity hydrometers are manufactured of clear glass and feature a metal ballast. Precision specific gravity hydrometers include multi-language (English, French, German, Italian, Portuguese and Spanish) Statement of Accuracy indicating accuracy traceable to NIST and DKD/PTB. Tested and calibrated in H-B Instrument’s exclusive triple accredited/registered ISO/IEC 17025:2005, A2LA accredited laboratory against equipment whose calibration is traceable to NIST and DKD/PTB. Temperature of Standardization 60°F/60°C. Length 325mm, Range 0.600 to 0.670 with 0.0005 Divisions, Accuracy: 0.001, H-B Instrument Part Number 50385.