One standard aluminum, black hub cap and mounting gasket. Dress up your wheels with a low-cost alternative. 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 = 6, bolt circle = 4 1/2”, bolt hole size = 5/16”, fit = steer Replaces: Stemco️#343-4024 SKF️#1612 Approximate dimensions = flange OD 5 1/4" flange ID 3 1/2" height 2 5/8" Approximate net weight = 12 oz