6002ZZ Shielded Ball Bearings 15mm x 32mm x 9mm 6002ZZ Shielded Ball Bearings, 6002ZZ Bearings are made of Chrome Steel, Bearing inner diameter is 15mm, Bearing outer diameter is 32mm and Bearing width is 9mm, each 6002ZZ bearing has Double Shielded to protect the bearing from dust or any possible contamination.