RapidAir 1/2in. Compressed Air Outlet features a versatile design that allows user to configure outlet for wall or ceiling mount and hidden or surface mount. U.S.A. Coupler Size (in.): 3/8 Wall or ceiling mount Includes 3/8in. NPT straight fitting, union elbow, hand valve, 1/4in. NPT nipple, 1/4in. NPT 45° fitting and 3/8in. NPT pl...