Needle type; round needle housing; 15/16 in. Bore; 1-1/16 in. Stroke; 4000 blows per min.; adjustable bayonet-type needle housing lock; lever throttle; 1/4 in. Npt air inlet; 5/16 in. Hose required; 15 in. Lg; supplied with nineteen 1/8 in. Diameter needles (5 in. Lg)