Available in a wide range of models measuring specific gravity / relative density g/cm of a variety of liquids in various ranges from 0.600 to 1.920, with 0.0005 divisions. Specific gravity hydrometers are the most widely used hydrometer, common in industries such as food and beverage, chemical, pharmacology, transportation, refrigeration and more. 325mm 12.8 long lead free ballast and glass 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.