Description_x000D_ General description_x000D_ These traps greatly reduce carry-over from foaming or bumping. Anything that may climb can return back down through the return hole at the bottom of this adapter._x000D_ Application: for use between the vapor tube and rotary evaporator flask to prevent solvent from being drawn into condenser in case of "bumping". A drain hole at the base of the inner tube allows solventt to drain back into the evaporation flask._x000D_ Legal Information_x000D_ Aldrich is a registered trademark of Sigma-Aldrich Co. LLC