CerroBrass - Barbed Hose Fitting: 3/4" x 3/8" ID Hose, Male Connector - 48755425 - MSC Industrial Supply
46MH-612LF 3/4"x3/8" Male Garden Hose x Compression Lead Free Brass
Green Leaf Inc. 3/4 in. MGHT x 1/2 in. Barb Garden Hose Adapter at Tractor Supply Co.
BrassCraft 3/8-in x 3/4-in Barbed Barb x Garden Hose Adapter Fitting at Lowes.com
U.S. Solid Brass Hose Fitting, Adapter, 1/4" Barb x 1/8" NPT Male Pipe Fitting, 1/4"x 1/4", 3/8" x 1/4", 3/8"x 3/8",1/2"x 1/2", 3/4"x 3/4" - U.S. Solid
Amazon.com: JoyTube Plastic Hose Barb Fittings 3/8" Barb X 3/4" NPT Male Thread Adapter Connector Pipe Fittings (pack of 6) : Industrial & Scientific
Amazon.com: Quickun Brass Hose Barb Reducer 3/4" to 3/8" Barbed Reducer Fitting Reducing Splicer Mender Union Adapter for Air Water Fuel : Industrial & Scientific