Design replaces the joint connection normally found between the with a 60mm I.D. flat flange and a quick release stainless steel clamp. on drying chamber has a groove for a silicone O-Ring to make a leak-tight flat flange on desiccant tube. Joints on condenser and flask are 24/40. item consists of condenser, drying chamber, desiccant tube, flask, and O-Ring.