1. Material: ABS 2. Separate twisting disk, flexible exercise more efficient 3. Sturdy engineering plastic, safe and stable 4. Maximum load-bearing capacity of 400KG, suitable for all kinds of people, family versatility 5. Double bearings precision structure, 360 degree rotation smooth and non-jamming 6. Enlarged non-slip feet, safe and non-slip 7. Size: 135 x 298mm