1. Size: adjustable 2. Weight: about 300g / piece 3. Material: webbing + buckle + safety buckle 4. Function: resistance training, speed / weight-bearing equipment 5. The difference between ordinary model and upgraded model: ordinary model buckle without lock, D buckle without welding, can pull 100kg weight; upgraded model buckle with lock, D buckle seamless welding, can pull 1500kg weight
