2pcs/set spray gun adapter Coupler and Plug Kit , Industrial Type D, 1/4 in. NPT, Stainless steel Quick Connect Air Fittings Set
https://www.vogueparade.com/shopping/EN/1417/1/1005003665672452/2pcsset-spray-gun-adapter-coupler-and-plug-kit-industrial-type-d-14-in-npt-stainless-steel-quick-connect-air-fittings-set//