Quickun 5/16" Hose Barb Fitting Plastic Equal Barb Joint Splicer Mender Adapter Union for Tubing Pipe Air Line (Pack of 5): Amazon.com: Industrial & Scientific
Amazon.com: 20 pcs 3/8" Barb x 1/2" NPT Male Connector, Plastic Hose Barb Fitting, Adapter, Industrial Hose Barb to Pipe Fittings Connect : Industrial & Scientific
Amazon.com: JoyTube Plastic Hose Barb Reducer Pipe fittings, 1/4" to 1/8" Hose ID Connectors Joint Splicer Mender Adapter Union Boat Water Air Aquarium O2 Fuel (Pack of 3) : Industrial & Scientific
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Amazon.com: JoyTube Plastic Hose Barb Reducer Pipe fittings, 5/16" to 1/4" Hose ID Connectors Joint Splicer Mender Adapter Union Boat Water Air Aquarium O2 Fuel (Pack of 6) : Industrial & Scientific