3/8 Inch Air Tube 1/8 1/4 3/8 1/2 Bsp Npt Thread Straight Joint Copper Plastic Fitting One Touch Hose Quick Pipe Connector - Pipe Fittings - AliExpress
Reusable Fitting, Quick Coupler 1/4" G Male x 9/32" Hose ID Air Hose Plug - 1/4" G x 8mm - Overstock - 28847668
Air Hose for Pneumatic Tools 1/4 in. Male x 3/8 in. Female Brass Pipe Reducer Coupler Connector Fitting 150 PSI Maximum 1/4 in 18 NPT Home Garage or Professional Shop: Amazon.com: Industrial & Scientific
Steelman 15-Foot Coiled 3/8-Inch Air Hose With 1/4-Inch Npt Fittings – Steelman Tools
Brass Reducer Bushing - 3/8 to 1/4 for air hose
Tru-Flate Automotive Quick Coupler Air Hose Fittings 3/8 Body x 1/4 NPT USA MADE | eBay
Joywayus Hose Barb Reducer 1/4'' to 3/8'' Reduce ID Barb Fitting,Hex Union Brass Fitting Water/Fuel/Air - 2 Pack: Amazon.com: Industrial & Scientific
1/4" Barb OD X 3/8" NPT Male End Air Hose Pipe Fitting Connector Adapter 5PCS | eBay