The NTN 3.25" Bore Round Tapered Roller Bearing Set is designed to help prevent damage due to thermal expansion. The design of the tapered roller bearings allows for the efficient transfer of heat away from the bearing, making it ideal for heavy duty applications. This set includes two tapered roller bearings, a bearing cup and a bearing cone. The bearings are made from high-quality steel for maximum durability and strength. FleetPride is your First Click in Heavy Duty®.