10 Shielded Bearing R166ZZ 3/16x3/8x1/8 inch 3/16 Inch BearingsSet of 10 Ball Bearings R166ZZ 3 16" x 3 8" x 1 8" inch Set of 10 R166ZZ Shielded Ball Bearings, Bearing inner diameter is 3 16", Bearing outer diameter is 3 8" and Bearing width is 2 16", each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, also bearings are pre lubricated with grease. Item: R166ZZ Ball Bearings Type: Deep Groove Ball Bearings Dynamic Load Rating: 160 LBS Static Load Rating: 60 LBS