Height Adjustable Door Ramp, Door Ramp for 3", 5.0" to 7.5" Rise Door, Heavy Duty Front Door Ramp for Elderly Wheelchairs/Walkers/Scooters(27.6" L 37.4" W, Alloy Iron, 36Lbs, Max 800Lbs). The door threshold ramp could be used directly at 3" height rise, 5" to 7" rise after installing the two universal legs.