Reducer 3/4" M to 3/8" ribbed barb

This adapter has a 3/4-inch male fitting at one end, and a ribbed barb fitting at the other end that slides inside a 3/8-inch pipe.

It is manufactured by Balboa and is used in particular with their Lo-Pro air jet, so that you can plumb it to 3/8-inch pipe.

Dimensions
Outside diameter smooth side : 27 mm or 3/4-inch
Outside diameter ribbed side : 10 mm
Length : 43 mm

Part numbers
Balboa: 31-9403