Advanced Search 1/4" 3/8" 1/2" 3/4" 1" 1-1/2" Home » Pneumatic Tool Manufacturer » AIR TOOL » Air Tool Accessories » Air Couplers & Plugs » Metal Couplers & Plugs Metal Couplers & Plugs View: 1/4" Metal (55) 5/16" Metal (11) 3/8" Metal (51) 1/2" Metal (50) 3/4" Metal (6) 1" Metal (6) Hose Metal (62) PU Metal (37)