VD040CP0 Thin Section Ball Bearing 4" x 5" x 1/2" inch Steel Quality: ABEC 1 VD040CP0 Thin Section Steel Open Ball Bearing, VD040CP0 is ABEC 1 quality, VD040CP0 bearing is Oil Preservative preserved, inner diameter is 4" inch, outer diameter is 5" inch and width is 1/2" inch.