LTWFITTING 1/4 in. x 3/8 in. I.D. Brass Hose Barb Reducer Splicer Fittings (50-Pack) HF3913R060450 - The Home Depot
1/8 NPT to 3/8 Hose Barb Fitting, Brass - Straight | Pegasus Auto Racing Supplies
3/8 Male Flare x 1/4 Hose Barb - propanegear
SPEEDAIRE Barbed Hose Fitting: For 1/4 in Hose I.D., Hose Barb x NPT, Male x Male, Hex - 6AFP0|6AFP0 - Grainger
JEGS 555-110846: -8 AN to Straight 3/8 in. Hose Barb Adapter Fitting | -8 AN Female to 3/8 in. I.D. Hose | Aluminum | Black Anodized Finish | Sold Individually - JEGS High Performance
TOUHIA 7/16 Barb x 1/4 NPT Male Pipe Brass Hose Fitting, Adapter(5PCS): Amazon.com: Industrial & Scientific
Pipe Fitting, Hose Barb Adapter, 1/2 MPT x 1/2-In. Brass | West True Value
JEGS 16002: NPT Straight Hose Barb Fitting | 1/8 in. NPT to 5/16 in. I.D. Hose | Brass | Gold Finish | Set of 2 - JEGS High Performance
1" MPT x 1-1/8" Male Hose Barb Adapter | ReplacementBoatParts
BrassCraft 1/2-in x 3/4-in Barbed Barb x Garden Hose Adapter Fitting in the Brass Fittings department at Lowes.com