"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 4 lbs, and can support up to a 1,500 lb capacity up to a 2"" rise; each ramp measures 12"" x 36"" x 2"" overall."