R4ZZ Nachi Bearing Shielded Japan 1/4" x 5/8" x 0.196"R4ZZ Nachi Shielded Ball Bearing 1 4" x 5 8" x 0. 196" inch Made in Japan R4ZZ Nachi Shielded Ball Bearing, inner diameter is 1 4", outer diameter is 5 8" and width is 0. 196, Made in Japan R4ZZ Nachi Ball Bearing Nachi Deep groove Ball Bearing Closures: Double metal shields (Z ZZ 2Z) for protection against dust and debris Dimensions: 1 4" x 5 8" x 0. 196" inch ID (inner diameter) Bore: 1 4" inch OD (outer diameter): 5 8" inch Width: 0. 196" inch