PRW Single Piece Chromoly Steel Pushrods - 5/16 Diameter with a wall thickness of .080. Black Designed specifically for high performance and racing applications, PRW single piece pushrods are cold formed from seamless 4130 chromoly steel tubing with a wall thickness of .080. These are heat treated for the ultimate in strength and durability. The ends are precision formed to provide a consistent wall thickness and concentricity. PRW pushrods are finished with a black oxide coating and laser etched with the length designation for easy identification. Oxidized and available various sizes from 7.200 thru 9.900. Set of 16.