Description: Automatic Rebound:  Our abdominal roller exercise wheel is with 7.5ft powerful silent rebound, automatic braking, mute, easy to control, perfect for stomach and core trainer training. Widen The Wheel: Our automatic rebound abdominal wheel is with two wheel for about 10.5cm width, widen and flat, non slip, lightweight and reliable, great for home, gym workout and body building. Strong Support: The abdominal exerciser is with symmetrical design, arched structure distributing the force, with with kneeling pad, stable and heavy duty, excellent stretch muscle trainer. Abdominal Training: The double wheel ab roller is perfect for training arms, shoulders, chest, abdomen, back, buttocks, thigh, legs, lower limbs, etc. A wonderful gift choice for families and friends. With Phone Bracket: There is also equipped with phone rack holder for this professional automatic rebound abdominal wheel kit with knee mat, available for having music while training. Specification: Material: Steel Pipe, ABS, Rubber Size: 25cmx33cmx15cm/9.84inchx12.99inchx5.91inch Size Chart: Abdominal Roller: 37cmx35cm/14.57inchx13.78inch Touch Down Size: 10cm/3.94inch Package Includes: 1 Abdominal Roller 1 Mat Note: Please allow slightly errors due to manual measurement and different monitors.