Advanced Search 1/4" 3/8" 1/2" 3/4" 1" 1-1/2" Home » PNEUMATIC TOOL MANUFACTURER » AIR TOOL » 29-Air Tool Accessories » Air Couplers & Plugs » Metal Couplers & Plugs Metal Couplers & Plugs View: 1/4" Metal (45) 5/16" Metal (11) 3/8" Metal (42) 1/2" Metal (46) 3/4" Metal (6) 1" Metal (6) Hose Metal (55) PU Metal (37)