Check the listing for details. Single Step Aluminium Manual Pull Out Retractable RV Camper Platform Steps Stair. Color: Sliver, Condition: New, Made in United States. Listed at 82.74 USD. Fitment： This product is used for the modification and upgrade of customer's motorhomes, camping vehicles, travel trailers, and towed vehicles. 1) If the chassis already has holes with a 515 pitch, they can be directly installed; 2) If the chassis has a different hole pitch, holes with a 515 pitch need to be drilled by oneself before installation; 3) If there is no place to drill holes on the chassis, angle iron can be welded to the vehicle chassis and then holes with a 515 pitch can be drilled for installation. The center hole diameter of the product is 515mm, and the installation hole size is 10mm. Description： .