"Silver Spring portable threshold ramps are the safe way to overcome differences in elevation in doorways and single steps with a wheelchair, powerchair, mobility scooter, walker, or cane. The lightweight solid foam threshold ramp is easy to carry, weighs only 13 lbs, and can support up to a 1,500 lb capacity up to a 5"" rise; each ramp measures 30"" x 36"" x 5"" overall."