7x11x3 Shielded Ball Bearing With Ceramic Balls One Bearing 7x11x3 Shielded Chrome Steel Ball Bearing with Ceramic Balls, this is a popular size that could be used in many applications that uses this size 7mm x 11mm x 3mm. bearing has 2 metal shields to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease.