203KRR5, 203RRAR8, 611928R91, 522-20SP for SpinCo Special Ag Bearing DIMENSIONS:BORE: .515" RoundO.D. 1.57" FlatIR Width: .72"OR Width: .472" For a precise fit and wise selection. Please confirm your model above before ordering. Double-check dimensions and photos for the right fit. Quality assurance ：Well-designed, excellent processing. Made of highly durable materials, rigorously This is a manufacturer substitution. Functional equivalent to prior parts.Product Description Well-designed, excellent processing.tested, compact & sturdy, longevous. Ultra Durable, Quality Replacement.Made from durable high quality material and well-tested by the manufacturermade from durable high quality material and well-tested by the manufacturer