Up for sale is a new never used extension for trailers, campers etc., From manufacturer: Description Jack Stand Drop Leg Foot Pad Insert Camper Trailer Extra Height 2" Standard Tall. Fits many jacks but not all, you MUST measure the ID of your jack to ensure it is 2". The outside tube diameter of the jack stand is 1-3/4 inch. IMPORTANT: Holes are NOT on the notched side; see photos and compare; REVIEW THE DIMENSIONS especially if you have an electric jack. Features & details Adjustable 12" Drop Leg Foot Stand with Pin for Jacks with 2" Inner Diameter (measure the ID of your jack before ordering to ensure fitment) Perfect for modern A-frame style RV jacks with 2 inch ID - Fits MOST 2K to 5K jacks - Specially designed tube that fits inside the inner tube of the jack IMPORTANT: Holes are NOT on the notched side; see photos and compare; REVIEW THE DIMENSIONS especially if you have an electric jack Height: 12", Distance between Holes: 2", Pin Hole Diameter: 3/8", Foot Diameter: 5", Outside Tube Diameter: 1-3/4” (fits jacks with 2” ID) Constructed of heavy duty zinc plated steel and built to last. Heavy duty stand eliminates the need for wood blocks or other temporary solutions - Reduces crank time and effort (less up and down cranking) Product information Manufacturer Red Hound Auto BrandRed Hound Auto Item Weight 2.9 pounds Product Dimensions 18 x 7 x 2 inches Item model number 4333465472 Thanks for looking, Joseph