6211LU Sealed Ball Bearing 55mmx100mmx21mm6211LU Sealed Ball Bearing 55mm x 100mm x 21mm 6211 LU Sealed Ball Bearing, 6211LU bearing is made from Chrome Steel,6211LU bearing is closed with rubber seals to protect the bearing from dust or any possible contamination, 6211LU bearing is self lubricated bearings, 6211LU bearing is already greased. 6211LU ball bearings Deep Groove Ball Bearing Closures: Rubber Sealed Material: Chrome Steel Size: 55mm x 100mm x 21mm Inner Diameter: 55mm Outer