Glass Feeding Tube w/ PTFE Valve for Ai 10L, 20L, 50L SolventVap

Ai high quality glass feeding tube with PTFE open/close valve for Ai 10L, 20L and 50L SolventVap series rotary evaporators. This tube is to be used with a PTFE extension tube (not included here) so that material can be routed directly into the evaporating flask.