7x11x3mm RC tractor small bearing MR117RS MR117 2RS for many applications, this is a popular size that could be used in many RC Cars and Trucks, Bearing is made of Chrome Steel, each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease. inner size 7mm, outer size 11mm, width 3mm. 7x11x3mm ball bearing is for old Corally models like the CCT, Pro10 and SPM12.