Stable rotation and silent design. The inside is flat without hitting your back. The depth is wide and your feet will be flat! The Silent Wheel F (Flat) is a small animal wheel that uses a large bearing for stable rotation, reducing friction noise when rotating. The rotating parts are integrated into the back of the main unit, and the surface of the body is flat so that your back will not hit when exercising. Also, just twist the bearing cover, you can put on and take off the wheel body, making it easy to clean.
PS, ABS, steel