USA Industrials - Brass Pipe Reducing Hex Coupling: 1/2 x 1/8″ Fitting, Threaded, FNPT x FNPT - 96943840 - MSC Industrial Supply
304 Stainless Steel, 1/2 in x 3/8 in Fitting Pipe Size, Reducing Coupling - 2UA82|2UA82 - Grainger
1-1/2" x 3/8" Black Iron Reducing Coupling – Ironwerks Designs
Pipe Fittings Direct. 1/2 x 3/8 inch NPT forged 304 stainless steel class 3000 reducing coupling
Brass Pipe Fittings - Lead Free 1/2" x 3/8" Reducing Couplings, NPT 125 PSI
1/2" x 3/8" Chrome Plated Bronze Reducing Coupling, Lead Free
1/2 to 3/8 Reducer Faucet Adapter - Compression Brass Pipe Fitting, 3/8 Male to 1/2 Male Supply Line Adapter for RV Kitchen Plumbing, Water Hose Pipe Connector with Rubber Washer, (2 Pack) - Amazon.com