1. 360-degree surround massage
2. 19/28 sections of track free splicing
3. Ergonomic joint track
4. Wavy loop bumps
5. Weighted power ball, adjustable length, inertial sliding track
6. Metal bearings, smooth and not stuck
7. ABS resin track, flexible and durable
8. 360-degree rotating axle, flexible rolling at a constant speed
9. Freely detachable, split joint track
10. Seiko hex nut fixed
11. Material: Plastic
12. Features: surround massage, inertial sliding, fixed waist circumference
13. Purpose: Easily reduce fat, massage and shape waist, and quickly tighten abdomen
14. Suitable waist circumference: 19 knots: within 90cm, 28 knots: within 160cm