Waterway Massage Internal Jet 5 Scallop Gray 212-7807 - Waterway Massage Internal Jet, 5 Scallop, Gray.

This jet is 3 inches in diameter. (3-5/16" Face)

 Jet has a 3 nozzle massage style face in gray.

Or see generic 3 inch directional jet 212-7929-STS.