OB92 ZZX Miniature Shielded Bearing 5/16x1/2x5/32 inchOB92ZZX Shielded Ball Bearing 5 16" x 1 2" x 5 32" OB92ZZX Shielded Ball Bearing, this is a popular size that could be used in many applications, the inner diameter is 5 16" inch, outer diameter is 1 2" inch and the width is 5 32" inch, each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, also bearing is pre lubricated with grease. Item: OB92ZZX Ball Bearing Type: Deep Groove Ball Bearing Shields: 2 Metal