CURT Dual Receiver Trailer Hitch Ball Mount, 2 Inch, 3,500 lbs Model 45792 56 VDO 125 Vantech 2 Bar Black Aluminum Clamp On 120LB Vantech 2 Bar Black Aluminum Clamp On Ladder Rack System Mercedes Sprinter 2002 2006 High Roof Model H2153B Shipping Weight (lb) 208 Color White Tank Capacity 90 gallons Material Steel Mounting Method Steel bed plate Approx When you have spacing issues with your hitch mounted accessories such as a bike rack or cargo carrier Hitch extensions are simply receiver tubes that insert into y our trailer hitch to add a certain amount of clearance for your vehicle's bumper or spare tire mounted on the back