All Balls Snowmobile Drive-Train Bearng & Seal Kits contain all of the bearings,seals,O-rings and misc. parts needed to refresh your Driveshaft or Jackshaft in one convenient package.All bearings are an ABEC 3 level precision hi-speed bearings filled with Kyodo-Yoshi PS2 low temp grease,sealed using low drag double lip seals to provide superior performance in all weather conditions. Type TC Nitrile Elastomer seals are also included with each kit, designed to keep the water and dirt out and provide an optioum seal.