2pcs 1/8 - 1/4 in. Airbrush Hose Adapter – HobbyistHaven
SuperMore 6-Ft Braided Airbrush Air Hose Standard 1/8" - 1/4" Adapter - Freedom Stencils
Amazon.com: Iwata Hose Adaptor 1/4 Female - 1/8 Male (I6241)
1x Mini Airbrush Air Hose Adapter Connector 1/4 Bsp Female To 1/8 Bsp Male Spray Gun Air Hose Quick Coupler Adaptor - Power Tool Accessories - AliExpress