Borosilicate glass weighing bottle, 20ml capacity. 1.6 (40mm) outside diameter, 1.2 (30mm) tall. Opening diameter is 1.4. Eisco glassware is designed to be used in labs but is often used in homes or garages as well. 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.