6211DDU Bearing 55x100x21 Sealed Ball Bearing6211DDU Sealed Ball Bearing 55mm x 100mm x 21mm 6211DDU Sealed Ball Bearing, 6211DDU bearing is made from Chrome Steel, 6211DDU bearing is closed with rubber seals to protect the bearing from dust or any possible contamination, 6211DDU bearing is self lubricated bearing, 6211DDU bearing is already greased. 6211DDU ball bearing Deep Groove Ball Bearing Closures: Rubber Sealed Material: Chrome Steel Size: 55mm x 100mm x 21mm Inner Diameter: 55mm Outer