Bubblers are used to monitor gas flow to reactions while providing a vent to the atmosphere. The reservoir head prevents oil from being sucked back into the system. Volume below the sidearm is approximately 40 ml. This bubbler has 8 mm O.D. top and side tubulations. The overall height is 216 mm, the body width is 25 mm, and the total width is 75 mm. The height from the bottom of the bubbler to the bottom of the lower sidearm is ~133 mm.