High Load Capacity: This door thresholds for interior and exterior doors can support up to 800 lbs/ 360 kg and supports safe passage of wheelchairs, scooters, walkers, canes, and crutches. Adjustable Height Ramp: Size: 27.8" L x 34" W x 6" H. Usable height range of 5.76-6.24"/ 14.6-15.8 cm.