Self Lubricating Bearings are available in Cast iron and pressed steel Housing, Easy to maintain, clean and replace. these bearings come pre-greased and sealed Available in 2 bolt, 4 bolt. available from RHP, SKF or unbranded. also available in a variety of housing styles. These bearings are self lubricating and so make sure the bearing is constantly lubricated and running smoothly perfect when smoothness is a must. Order now from Bearingtech for quick delivery.