Crude oil (also often called petroleum) is one of the most important raw materials and is used to manufacture a wide range of chemical products such as pharmaceuticals, fertilisers, solvents and plastics. Sample vessels and test methods must therefore meet the highest quality and regulatory standards. Following strict manufacturing processes and in combination with the new Lazer-Fused™ technology, the DURAN® oil centrifuge tubes offer this required quality. Using Lazer-Fused™ technology, markings and graduations are lasered onto the glass surface of the DURAN® oil centrifuge tubes. This provides excellent resistance to aggressive solvents and unsurpassed readability and line uniformity across the entire scale range.