This is a 520x88 drive chain for your 1996-1999 Polaris 4x4 300 Xplorer. This is a non o-ring style chain designed to correctly replace your oem chain and it comes complete including the masterlink and keeper. We also offer replacements sprockets so be sure to check them out in our storefront. We'll gladly ship them with the chain to save on shipping costs. We offer new drive chains and sprockets for most atvs so be sure to check out our other store items.