6220ZZ Shielded Ball Bearing 100mm x 180mm x 34mm One Bearing 6220ZZ Shielded Ball Bearing, inner diameter is 100mm, outer diameter is 180mm and width is 34mm,Bearing is made of Chrome Steel,, 6220ZZ bearing has 2 Metal Shields to protect the bearing from dust or any possible contamination, bearing is pre-lubricated with grease.