6917ZZ Shielded Ball Bearing 85mm x 120mm x 18mm One Bearing 6917ZZ Shielded Ball Bearing, the inner diameter is 85mm, outer diameter is 120mm and the width is 18mm, this is a popular size that could be used in many applications, Bearing is made of Chrome Steel, each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease.