FLASK FILTER WITH SIDE ARM SCHOTT DURAN
From R 47.30
A filter flask is a thick-walled Erlenmeyer flask with a short glass tube and hose barb protruding about an inch from its neck.
The short tube and hose barb effectively act as an adapter over which the end of a thick-walled flexible hose (tubing) can be fitted to form a connection to the flask. The other end of the hose can be connected to source of vacuum such as an aspirator, vacuum pump, or house vacuum.