1/4,3/8,1/2, NPT Male Thread Pipe Fitting x 8mm 10 mm OD Barb Hose Tail Reducer Connector Fitting Stainless Steel 304
https://www.vogueparade.com/shopping/EN/200282142/1/32881285827/143812-npt-male-thread-pipe-fitting-x-8mm-10-mm-od-barb-hose-tail-reducer-connector-fitting-stainless-steel-304//