One standard aluminum hub cap and mounting gasket. Hub cap 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 = 4, bolt circle = 3 5/8”, bolt hole size = 5/16”, fit = steer Replaces: Stemco️#343-5110 Approximate dimensions = flange OD 4 1/2” flange ID 2 1/2” height 2 1/4” Approximate net weight = 10 oz