Description: Multi Functional: Versatile ab training equipment can tone all areas including back, shoulders, arms, chest, triceps and stomach, including obliques and hip flexors. Good Material: This abdominal wheel is made of multilayered material, which is soft and quiet, strong and wear resistant, and does not hurt the floor. Stable and Smooth: Super stable and easy to control, Two wheel Ab Rollers well balanced, suitable for beginner or advanced fitness level. Automatic return function: stable double-wheel design, automatic return, no need to worry about the injury caused by the failure of the abdominal muscles to brake during exercise, and it is easier to persist. This abs wheel can exercise abdominal muscles and also do supports, multi-functional 2-in-1 equipment, allowing you to exercise in more ways. Specification: Material: PP, Steel Size Chart: 25cmx10.5cmx22cm Package Includes: 1 Piece Ab Rollers Wheel Note: Please allow slightly errors due to manual measurement and different monitors.