10-Pack 5x8mm Shielded on Both Sides 5x8x2.5mm Ball 5mm Bore Diameter Bearings5 x 8 x 2. 5 Shielded Ball Bearings 10 Ball Bearings 5 x 8 x 2. 5 Shielded Ball Bearings, this is a go to bearing size that fits lots of RC cars and trucks or any application, Made from high strength chrome steel for durability and performance, each Comes with double metal shields (ZZ) to keep out dust and dirt, additionally, these bearings come pre lubricated with grease for smooth operation. 5 x 8 x 2. 5 Ball Bearings Deep Groove Ball Bearings