This Waterway Cluster jet socket connects to 3/4" flexible pipe for the water entry, and has a barbed connector for 3/8-inch pipe for air, which is sucked in by the Venturi effect.
You can srew any Cluster Jet into the socket, including the Cluster Roto.
Internal diameter of the thread : 23 mm
External diameter of the face : 38 mm
Length : 62 mm
Water : Barbed connection for 3/4-inch flexible pipe
Air : Barbed connection for 3/8-inch flexible pipe
Waterway : 212-0090
Sunrise Spas : R3035306