This adapter permits vacuum ports such as those on the AF-0452-01 manifold to connect to standard rubber pressure tubing. This adapter comes in two styles. Style A is a basic connector, while Style B has a constriction above the serrated hose connection to permit bowl area to be filled with glass wool preventing solids from being drawn into the manifold. Both styles feature glass ears/ hooks just below the grind for use with CG-110-01 stainless steel springs (or rubber bands).
The hose barb measurements listed are the diameter of the barb at the middle serration.