6200ZZ Shielded Ball Bearings 10mm x 30mm x 9mm 10 Bearing Lot of 10 Ball Bearings 6200ZZ, inner diameter is 10mm, outer diameter is 30mm and width is 9mm, Bearings are made of Chrome Steel, each 6200ZZ bearing has 2 Metal Shields to protect the bearing from dust or any possible contamination,6200ZZ bearings are pre-lubricated with grease.