"The Silver Spring Rubber Solid Threshold Ramp is the ideal solution for making short rises up to 3/4"" high more accessible for individuals using wheelchairs, scooters, power chairs, or walkers. These solid rubber ramps have a massive 1,500 lb. weight capacity. Perfect for use indoors or out, these solid, yet flexible, rubber threshold ramps feature molded drain channels to prevent water accumulation and improve traction, and their sleek, beveled edges provide a smooth approach for wheelchairs from any side and any angle. Thanks to their all-weather, non-slip rubber construction these handy wheelchair ramps are perfect for outdoor use and they work great on uneven surfaces."