Description: Four Way Coupling (Pneumatic accessory) with aluminum socket; Coupler type: Japan/Nitto type; Description: Four Way Coupling (Pneumatic accessory) with aluminum socket;Coupler type: Japan/Nitto type;Coupler material: Steel, Zinc alloy;Coupler size: 1/4", 3/8", 1/2" BSP thread;Socket material: Aluminum, with oxidated color; Four Way Coupling (Pneumatic Accessory)