Non O-Ring Chain and Sprocket Set 64L,70L,88L 1996-1999 Polaris 300 Xplorer 4X4 Sprocket Set includes: 11T, 12T, 13T, 22T, 22T, 40T sprockets and 520-64L, 520-70L, 520-88L Non-O-Ring Chain All Race-Driven sprockets meet or exceed OEM specifications and use hardened S45C steel. Non-O-Ring chain doesn't have o-rings between the links so it is lighter, thinner and has less drag. Fits 1996 1997 1998 1999 Polaris Xplorer 300 4x4