Features: This wheelchair anti rollovers is an electric wheelchair support wheel with a sturdy anti tilt wheels designed to provide stability and support for your wheelchair.Quality materials: Made of sturdy aluminum alloy, this electric wheelchair wheels is sturdy and can withstand daily use.Product size: The support wheel size is 20cmx5cm, and the wheel diameter is about 4cm, which is suitable for most standard electric wheelchairs.Package includes: Each package comes with a pair of reverse wheels, which is great for replacing both sides at a time or keeping a more as a spare.Easy to install: The aluminum alloy bracket and fixed tube design make it easy to install on the wheelchair, instantly enhancing stability and security.Specification:Material: aluminum alloySize Chart:20cmx5cm/7.87inchx1.97inchWheel diameter: 4cm/1.57inchPackage Includes:1 Pair Anti Rollovers WheelsNote:Please allow slightly errors due to manual measurement and different monitors.