R6ZZNR Ball Bearing with Snap Ring, the N stands for a groove in the outer race, the R stands for a removable snap ring (C clip). Item: R6ZZNR Ball Bearing type: Deep Groove Ball Bearing Lubrication: Grease Closures: Metal Shields Inner Diameter: 3/8" inch Outer Diameter: 7/8" inch Width: 9/32"...