Front Differential Bearing Kit includes are bearings and seals necessary to do a Differential rebuild.High Speed ABEC BearingsSealed Bearings use double or triple-lip seals with stainless steel garter springs to better keep the grease in and the water and dirt outPremium Grease with rust/oxidation inhibitorsApplication: Polaris RZR 4 900 2017Polaris RZR XP Turbo / RZR 4 XP Turbo 2016