🔍 Measure with Confidence: Your Go-To Hydrometer for Precision! Individually serialized with NIST traceability for peace of mind. Crafted with lead-free ballast and glass for a sustainable choice. Multi-language Statement of Accuracy for international compliance. Conforms to ASTM No. 5H standards for unmatched accuracy. Measures specific gravity of oil and petroleum products effortlessly. Multi-language support Length: 330mm Accuracy: ±0.1° The SP Bel-Art H-B DURAC Hydrometer is a high-precision instrument designed to measure the specific gravity of oil and petroleum products. Conforming to ASTM No. 5H standards, it features a length of 330mm, an accuracy of ±0.1 degrees, and is packaged with a multi-language Statement of Accuracy traceable to NIST. With its lead-free construction and individual serialization, this hydrometer is the perfect blend of reliability and eco-conscious design.