10-Pack 5x8x2.5mm Shielded ABEC-5 Miniature 5mm Bore Bearings5 x 8 x 2. 5 ABEC 5 Stainless Steel Ball Bearings Lot of 10 Bearings 5 x 8 x 2. 5 ABEC 5 Stainless Steel Ball Bearings, additionally, these bearings come pre lubricated with grease for smooth operation, Bearings are made from stainless steel, each Comes with double metal shields (ZZ) to keep out dust and dirt. 5 x 8 x 2. 5 Ball Bearings Deep Groove Ball Bearings Size: 5mm x 8mm x 2. 5mm Bearing Inner Diameter: 5mm Bearing Outer Diameter: 8mm Bearing