6x12 Tamiya Traxxas Ball Bearings Lot of 50 Bearings High Quality 50 bearings 6mm x 12mm Tamiya Traxxas Ball Bearings, this is a popular size that could be used in many Vintage Radio Control Cars and trucks, Bearings are packed 10 bearings in one plastic tube. Bearings are made of Chrome Steel and can rotate up to 53000 rpm, each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease.