100-Pack R8ZZ-C3 QZY Ball Bearings - C3 ClearanceR8ZZC3 QZY Shielded Ball Bearing with C3 Clearance 1 2" x 1 1 8" x 5 16" Pack of 100 R8ZZC3 QZY Shielded Ball Bearings, a standard bearing size commonly used in a variety of industrial and commercial applications, measures an inner diameter of 1 2" inch, outer diameter is 1 1 8" inch and the width is 5 16" inch, each Comes with double metal shields (ZZ) to keep out dust and dirt, plus its pre lubricated with grease so its ready to roll right away.