Transparent, lightweight and unbreakable. Designed for vacuum and non-vacuum applications. Made entirely from polycarbonate; a safe alternative to glass. Will not shatter or implode at full vacuum when used according to included instructions. Holds a vacuum of 28 in. Hg for 24 hours. For room temperature use only. Silicone O-ring assures an airtight seal; no need to use grease. Accepts 0.26 to 0.36” I.D. vacuum tubing. TPE caps seal side-arms for non-vacuum use. Accepts standard 230 mm plate. Desiccator plate not included. Base diameter: 280 mm. Caution: Do not autoclave, or expose to organic solvents or their vapours.