... Body size: 1/4", 3/8", 1/2"; Name: USA Industrial Type Air Couplers, Milton type(Air Coupler, Air Tool Coupler ... 1 / 4", 3 / 8", 1 / 2"; Coupler type: Milton type, Industrial type; Surface treatment: Zinc plated, acid washing; Working pressure: No ... air pressure equipments; The quick couplers include: Female thread socket, Male thread socket, Socket with hose tail, Male thread plug, Female thread plug ...