Lippert Components 372261 Electric Step (Step 32 Series Double Tread) Supports up to 300 lbs. Heavy-gauge steel and black powder-coated 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: 24 inches: Mounting Bolt Pattern: 8 x 22 inches