10-Pack 3x8 Sealed 3x8x3 Miniature Bearing3 x 8 x 3 Sealed Ball Bearings Lot of 10 Bearings Lot of 10 Sealed Ball Bearings, The size is 3mm x 8mm x 3mm, Made from high strength chrome steel for durability and performance, each bearing are rubber sealed from both sides to protect the bearing from dust or any possible contamination, additionally, these bearings come pre lubricated with grease for smooth operation. 3 x 8 x 3 Ball Bearings Deep Groove Ball Bearings Closures: Two Rubber Seals