This listing is for (1) 520 Non O Ring chain, (1) Front Sprocket, (1) Rear Sprocket, to fit the following models: 1996-1997 POLARIS 400 (400L) XPRESS. 2X4 (1) 13 T Steel Front Sprocket, (1) 34T Steel Rear Sprocket, (1) 520-84L Non O Ring chain all chains include masterlink. Race-Driven branded chain has a tensile strength in excess of 7600 LBS. Race-Driven Sprockets are made from high quality steel to meet or exceed OEM specifications.