This 500ml separating funnel has a robust pear shaped body with a 3.75 diameter at its widest point. The item measures 9.5 in height when positioned upright and is designed with a glass stopcock that allows optimal control of flow when working with liquids in the lab. The interchangeable plastic 24.29 stopper fits 1.25 opening at the top of the funnel, and the spout measures 3.75 down from the stopcock. The spout has a 3.8 outer diameter and a 1.4 interior diameter. Autoclavable, with superior chemical durability. Low temperature gradient can withstand high temperatures and thermal shocks. Eisco Labs Borosilicate glass has the following heat tolerances Strain Point 515°CAnnealing Point 565°CSoftening Point 820°C.Eisco Labs proudly manufactures its own products using stateoftheart equipment, and following the highest standards of quality control. Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind. They are manufactured with only the highest grade, raw materials and according to international quality standards to ensure that they can withstand use in even the toughest laboratory environments.