Lippert Components 372779 Electric Step (42 Series Double Tread) Supports up to 750 lbs Heavy-gauge Steel and Black powder-coated finish for long-lasting durability Solid Steel drive rods and Stainless Steel bushings Hidden Amber light guides user in the Dark Rise: 6 in; run: 9 in; tread: 26.25 in; mounting bolt pattern: 18 x 29 in