Lippert Components 3722862 Electric Step (Step 34 Series Double Tread) Supports up to 300 lbs. Heavy-gauge steel and black powder-coat finish for long-lasting durability Solid steel drive rods and stainless steel bushings Sealed wiring connectors stand up to the elements Rise: 7 inches; Run: 9 inches; Tread: 30 inches; Mounting Bolt Pattern: 8 x 26 inches