Specifications: Extended Length: 4ft (1220mm) Min Length: 745mm Weight per ramp: 2,55kg Capacity: 275kg Total width: 190mm Max. load height / step height: 200mm The surface on all of our wheelchair ramps is glued onto the metal ramp. Therefore these ramps are not suitable to be kept outside and exposed to weather. Only designed to be used as a mobility aid for manual wheelchairs. .