Balboa Hydro-Air (ITT) Magna and SL Magna Series Jet Manifold Assembly 10-4870. Assembly includes Jet Body Nozzle Gasket and Wall Fitting. Therapy Option or Jet Trim Kit sold separately. Fits Adjustable Directional Single and Dual Port Flowpath Jet Internals. Jet Body has single air/water connections on opposite sides (not a Stacked Jet configuration) with 3/4 Slip Socket Water connection and 3/8 ribbed hose barb Air connection. 3 Spa Jet requires 2-5/8 hole for mounting.