Ball Bearing 30x42x7 Ceramic Hybrid 6806-2RS C3 Chrome Steel and Ceramic Balls Hybrid ceramic chrome steel sealed bearing 6806-2RS Bearing with ZrO2 Ceramic Balls Electric motor quality, Bearing 6806-2RS is a popular size that could be used in many application that uses this size 30mm x 42mm x 7mm, each 6806 bearing is closed with 2 Rubber Seals, double sealed and one seal from each side to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease, Bearings 6806 has industrial packaging.