CONCORD 304 Stainless Steel 3/8" Barb Hose to 1/2" NPT Home Brew Fitting. 2 Pack Go to amazon.com Related posts 9 best 3/8" 1/2" stainless steel Feature304 Grade Stainless Steel. Highest Grade Currently Available3/8" Barb to 1/2" NPT fittingGreat for attaching 3/8" inner diameter hose1/2" NPT Male fittingYou get 2 units per pack DescriptionSize: 3/8" Barb End to 1/2" NPT Male End