H-B Instrument B61800-0000 Plain-form Polycarbonate Hydrometer, 1.000-1.180 Sg/0.002 Div Made from optical quality polycarbonate plastic material; durable and shatterproof; ideal in situations where rough handling or contamination could be an issue Measures specific gravity / relative density (g/cm3) of a variety of liquids; Range: 1.000/1.180 Easy to read black scale on yellow back to help avoid eye fatigue Individually serialized; lead free ballast Packaged with a multi-language (English, French, German, Italian, Portuguese, and Spanish) Statement of Accuracy indicating accuracy traceable to NIST; Former HB #4900