https://chemglass.com/bubblers-modified-airfree-schlenk

AF-0516
BUBBLERS, MODIFIED, AIRFREE, SCHLENK
Bubblers & Manometers
Used to monitor gas flow to reactions while providing a vent to the atmosphere. Reservoir head prevents oil from being sucked back into the system. Standard taper inner joint is for use in single or multi-neck flasks. Hose connection has a 9mm OD middle serration. The 24/40 jointed bubbler is available in two sizes; the larger for use in vessels having a capacity greater than 100mL.

AF-0516-03
Bubbler, Modified, 24/40 Inner Joint, 200mm OAH, Airfree, Schlenk