ProAiir Adaptor Snorkel Cap by ShowOffs Body Art is ideal to complement your siphon- fed airbrushes. Snorkel cap suits any 1 or 2 oz size bottles when using with siphon feed airbrushes. Trim the tube accordingly to fit your paint bottle as it comes longer than needed. It is best to snip at an angle and leave some clearance between the bottom and the tube.