VB040CP0 Thin Section Ball Bearing 4" x 4 5/8" x 5/16" inch VB040CP0 Thin Section Steel Open Ball Bearing, VB040CP0 is ABEC 1 quality, VB040CP0 bearing is Oil Preservative preserved, inner diameter is 4" inch, outer diameter is 4 5/8" inch and width is 5/16" inch.