"Durable, adjustable height doorway and step threshold ramp with a 400 lb capacity for wheelchairs, foot traffic, and light utility carts. The portable threshold ramp measures 28.34""L x 31.25""W x 3.75"" to 7.5""H overall, with a 26.18"" usable surface and two bright yellow side rail curbs. Designed to work with doors that swing inward only, the wheelchair and utility ramp features an epoxy-based high traction surface for an even transition over steps and thresholds. Includes easy to turn adjustment knobs and a one year manufacturer's warranty."