One standard aluminum hub cap and mounting gasket. Hub cab includes oil window, vent plug, and side pipe fill plug, mounting bolts not included. Die-cast from aluminum alloy to help dissipate heat, resist breaking, warping, and cracking. Bolt holes = 6, bolt circle = 5 1/2”, bolt hole size = 5/16”, fit = steer Replaces: Stemco️#343-4249 SKF️#1753. Approximate dimensions = flange OD 6 3/16" flange ID 4 7/16" height 1 13/16"