Waterway Ozone Injector 3/4" RB x 3/4" RB x 3/8" RB 670-3010 This item in white has a 3/4" barb connection on both ends as well as a 3/8" barb port and is a hot tub ozone injector.
CMP Jet Body for 5" Typhoon Jets- 3/4" RB Water x 3/8" RB Air 23452-000-000 by Custom Molded Products. This jet body is discontinued and no longer available.