10-Pack Sealed Bearing 4x8x3 Miniature4 x 8 x 3 Sealed Ball Bearings Lot of 10 Bearings Set of 10 Ball Bearings 4 x 8 x 3, each bearing has 2 Sealed to protect the bearing from dust or any possible contamination, additionally, these bearings come pre lubricated with grease for smooth operation, Bearings are packed 10 bearings in one plastic tube. 4 x 8 x 3 Ball Bearings Deep Groove Ball Bearings Size: 4mm x 8mm x 3mm Inner Diameter: 4mm Outer Diameter: 8mm Width: 3mm Closures: 2 Sealed