Ideal for vacuum drying, degassing and teaching demonstrations, this vacuum chamber can withstand a full vacuum at room temperature.One piece O-ring seals the clear polycarbonate top to white polycarbonate base platePolypropylene stopcock with Teflon® PTFE plug and tapered hose barb accepts tubing with 0.25" (6 mm) I.D.TEFLON® is a registered trademark of The Chemours Company FC LLC and used under license by Bel-Art Products, Inc.