This listing is for a brand new set of 16 push rods that are made in the USA by Elgin Industries. Set comes with 16 pushrods. Part Number: PR339S Diameter: 5/16" Overall length: 8.182" Material: C1010 .060" Wall Tubing. These are compatible replacements for 351W CID (5.7L) Windsor 1978-1986 Passenger Cars w/Stamped Steel Rocker Arms 351W CID (5.7L) Windsor 1978-1993 Pick Up Trucks (From S/N BA0,001) w/Stamped Steel Rocker Arms 351W CID (5.7L) Windsor 1994-1996 F150 Lightning Pick Up Trucks