R4ZZ 1/4x5/8x0.196 inch Shielded Miniature Bearing Pack of 10Ball Bearings R4ZZ 1 4" x 5 8" x 0. 1960" Lot of 10 Bearings R4ZZ Pack of 10 R4ZZ Ball Bearings, R4ZZ the inner diameter is 1 4", R4ZZ outer diameter is 5 8" and the R4ZZ width is 0. 196", R4ZZ is a popular size that could be used in many applications, each R4ZZ bearing has 2 metal shields to protect the bearing from dust or any possible contamination, also R4ZZ bearings are pre lubricated with grease. Dimensions: 1 4inch x 5 8inch x 0. 196inch