3 x 6 x 2.5 Sealed Ball Bearings Lot of 10 Bearings 3 x 6 x 2.5 Sealed Ball Bearings, the inner diameter is 3mm, outer diameter is 6mm and the width is 2.5mm, each bearing has 2 Rubber Sealed to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease.