686-2RS Sealed Ball Bearings 6mm x 13mm x 5mm Lot of 10 Bearings 686-2RS Sealed Ball Bearings, this is a popular size that could be used in many RC wheel and motor applications that uses this size 6mm x 13mm x 5mm, each bearing has 2 Seals to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease, Bearings are packed 10 bearings in one plastic tube.