F606ZZ Flanged Ball Bearing 6mm x 17mm x 6mm One Bearing F606ZZ Flanged Ball Bearing, Bearing inner diameter is 6mm, Bearing outer diameter is 17mm and Bearing width is 6mm, Bearings is made of Chrome Steel, each bearing has 2 Metal Shield to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease.