Brass Straight Hose Pipe Fitting Equal Barb Reducing Joint 4/6/8/10/12/14/19/25mm Gas Copper Barbed Coupler Connector Adapter
https://www.vogueparade.com/shopping/EN/200282142/1/1005003612166964/brass-straight-hose-pipe-fitting-equal-barb-reducing-joint-4681012141925mm-gas-copper-barbed-coupler-connector-adapter//