10-Pack 3x8 Open 3x8x2.5 Miniature BearingBall Bearings 3x8x2. 5 Lot of 10 Bearings High Quality 10 bearings Wheel Ball Bearings for many applications, this is a go to bearing size that fits lots of RC cars and trucks, or any application that uses this size 3mm x 8mm x 2. 5mm. Made from high strength chrome steel for durability and performance and can rotate up to 85000 rpm, Bearings are packed 10 bearings in one plastic tube. Size: 3mm x 8mm x 2. 5mm Deep groove ball bearings Closures: Open