This distillation adapter has standard taper top outer and lower inner joints with a sealed-in drip tip. The serrated hose connection has an O.D. of 10 mm at the largest serration for connection to vacuum source.
The 14/20 and 19/22 sizes are approximately 105 mm h x 50 mm wide. The 24/40 and 29/42 sizes are approximately 170 mm h x 55 mm wide.
Application note: Some vacuum distillations need to be performed at a specific pressure rather than full dynamic vacuum. To maintain a relatively low vacuum (~2-50 torr), once can use an adjustable bubbler such as item #AF-0513-A-21 as a low-tech vacuum control (manostat). For those situations where you need to operate at pressures as high as 760 torr or want to avoid the use of mercury (a good idea), consider a Mano-Watch™ vacuum controller/monitor, item #20900-A