6210DDU Bearing 50x90x20 Sealed Ball Bearing6210DDU Sealed Ball Bearing 50mm x 90mm x 20mm 6210DDU Sealed Ball Bearing, 6210DDU bearing is made from Chrome Steel, 6210DDU bearing is closed with rubber seals to protect the bearing from dust or any possible contamination, 6210DDU bearing is self lubricated bearing, 6210DDU bearing is already greased. 6210DDU ball bearing Deep Groove Ball Bearing Closures: Rubber Sealed Material: Chrome Steel Size: 50mm x 90mm x 20mm Inner Diameter: 50mm Outer