With this coupling action， you can quickly change airbrushes when you use multiple airbrushes with a single air supply hoseAutomatically shuts off air flow from the hose when disconnectedSuitable for most airbrushes and hoses with 1/8" size fittingsMateriral:Alloy. Length:0.71 inch /1.8 cm Color: SilverPackage includes: 2 pcs disconnect Coupler Hose Connector 1/8" fittings