Size: The Length is 4.9inch(12.5cm).
Portable: Lightweight and portable design, small occupation, portable for a work out anytime, anywhere, easy to install and storage, convenient to use.
High-quality material: The thick foam soft and comfortable, protect the instep from pain. The cold-rolled steel with high strength, high hardness and bright surface.5 inch diameter large suction rubber chassis with strong suction and stability.
Easy Installation: Easy for home installation without any tools, find a clean flat ground first, then put the sit-up bar on the ground and pull down the lock. Lastly adjust the gear position to fit your feet.