5x9 Open 5x9x2.5 Miniature Bearing Pack of 10Ball Bearings 5x9x2. 5 Lot of 10 Bearings Quality Lot of 10 bearings Wheel Ball Bearings for many applications, used in many (radio control) RC Cars and Trucks, or any application that uses this size 5mm x 9mm x 2. 5mm. Bearings are made of Chrome Steel and can rotate up to 50000 rpm, Bearings are packed 10 bearings in one plastic tube. Size: 5mm x 9mm x 2. 5mm Type: Deep groove ball bearings Closures: Open Quantity: 10 Bearings Packing: 10 bearings