Ball Bearings 6x12x4 For Tamiya Clodbuster Lot of 10 Bearings High Quality 10 bearings Ball Bearings for many applications, this is a popular size that could be used in many RC Cars and Trucks, they are used in the Tamiya Clodbuster, or any application that uses this size 6mm x 12mm x 4mm, however, PLEASE make sure this is the size of your needed bearings, if you are not sure, DO NOT BID. Bearings are made of Chrome Steel and can rotate up to 49000 rpm, each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease, Bearings are packed 10 bearings in one plastic tube.