61903ZZ 17x30x7 Shielded Bearing Pack of 10Set of 10 Ball Bearings 6903ZZ 17mm x 30mm x 7mm Set of 10 6903ZZ shielded ball bearings , Bearing inner diameter is 17mm, Bearing outer diameter is 30mm and Bearing width is 7mm, each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, Bearings are made of Chrome Steel, also bearings are pre lubricated with grease, Bearings are packed 10 bearings in one plastic tube. Item: 61903ZZ Ball Bearings Type: Deep