VB055CP0 Thin Section Ball Bearing 5 1/2" x 6 1/8" x 5/16" inch VB055CP0 Thin Section Steel Open Ball Bearing, VB055CP0 is ABEC 1 quality, VB055CP0 bearing is Oil Preservative preserved, inner diameter is 5 1/2" inch, outer diameter is 6 1/8" inch and width is 5/16" inch.