Paintball PCP Air Rifle Quick Disconnect Release 8mm Stainless Steel/Copper Double Male Quick Head Connection Fill Fitting
https://www.vogueparade.com/shopping/EN/100005571/1/32731991972/paintball-pcp-air-rifle-quick-disconnect-release-8mm-stainless-steelcopper-double-male-quick-head-connection-fill-fitting//