Hydrometers are individually serialized and feature a metal ballast. 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 our 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°F. Length 165mm, Range 1.000 to 1.070 with 0.001 Divisions. H-B Instrument Part Number 50570.