Heavy wall, wide mouth flask with a GL80 glass thread and a 24/40 connecting adapter. Flasks have a heavy wall for vacuum applications and are balanced to prevent run-out during rotation. Unique design makes it easier to handle highly viscous liquids, powders, and solids. The large opening permits trouble-free emptying and cleaning and easy access of products with a spatula or policeman. The flask contour is excellent for controlled evaporation of foaming solvents during rotary evaporation. Complete code supplied complete with PTFE GL80 to 24/40 adapter (CG-1512-X-20). PTFE adapter has FDA grade silicone gasket behind a PTFE envelope type seal so that liquid or powders are only exposed to glass or PTFE.