61905-2RS Ceramic Hybrid Ball Bearing C3 Chrome Steel and Ceramic Balls 61905-2RS Hybrid ceramic chrome steel sealed bearing with Si3N4 Ceramic Balls Electric motor quality, 61905-2RS is a popular size that could be used in many applications, each 61905-2RS bearing is closed with 2 Rubber Seals, bearing is 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, Bearing has industrial packaging.