1pcs 304 Stainless Steel Hex Nipple 1/4" 3/8" 1/2" 3/4" 1" BSP Male Thread Reducing Straight Connector Pipe Fittings Adapter
https://www.vogueparade.com/shopping/EN/200282142/1/1005003634640655/1pcs-304-stainless-steel-hex-nipple-14-38-12-34-1-bsp-male-thread-reducing-straight-connector-pipe-fittings-adapter//