"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 2 lbs, and can support up to a 1,500 lb capacity up to a 1"" rise; each ramp measures 6"" x 36"" x 1"" overall."