10 YoYo Ball Bearings Fits Freehand and Turbo Bees YoYos 10 Bearings YoYo Ball Bearings for Freehand and Turbo Bees YoYos, Bearings are made of Chrome Steel and can rotate up to 71000 rpm, each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease.