Adapter,drying tube spce: "U" shaped ,straight. 75 Adapter drying tube,"U" shaped with joint.cotton is usually used to contain drying agentadapter,drying tube ,straight with top and bottom jointsadapter,drying tube ,75 angled at 75 to avoid desiccant contact with reactionsjoint:14/20,19/22,24/40,29/42 Adapter,drying tube,lab glassware