VD045CP0 Thin Section Ball Bearing 4 1/2" x 5 1/2" x 1/2" inch Steel Quality: ABEC 1 VD045CP0 Thin Section Steel Open Ball Bearing, VD045CP0 is ABEC 1 quality, VD045CP0 bearing is Oil Preservative preserved, inner diameter is 4 1/2" inch, outer diameter is 5 1/2" inch and width is 1/2" inch.