The Eaz-Lift 30-Inch Scissor Jacks fit pop-ups, trailers and other large vehicles. They allow for either bolt-on or weld-on installation. The scissor jacks have a certified 5000 lb. load capacity and are constructed of heavy-duty steel and powder-coated for maximum rust protection. Comes as a set of two. Measures 4 3/8-inches high when fully collapsed and 29 ¾-inches when fully extended.