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 » Composite Couplers & Plugs Composite Couplers & Plugs View: 1/4" Composite (12) 5/16" Composite (6) 3/8" Composite (18) 1/2" Composite (18) Hose Composite (15) PU Composite (17)