This aluminum alloy door threshold ramp makes access smooth and easy. At 4-inch tall, it bridges patios, garages, and steps for wheelchairs or carts. Built with aircraft-grade aluminum, it supports up to 800 lbs, resists rust, and has anti-slip grooves for security in rain or snow. Quick to install and ready to use indoors or outdoors. | Vevor | | Door Threshold Ramp, 4 inch Rise, Aluminum Alloy Threshold Ramp Rated 800 lbs Load Capacity, Handicap Ramps | Silver | Best Buy