Force rope strength:_x000D_ Yellow 15 lbs (5 * 8 * 1200), Green 25 lbs (6 * 9 * 1200),_x000D_ Red 20 pounds (5 * 9 * 1200), Blue 30 pounds (5 * 10 * 1200),_x000D_ Black 35 pounds (5 * 11 * 1200)_x000D_ Material: rubber tube + metal buckle + nylon elastic bands + foam cotton;_x000D_ _x000D_ Function: fitness and body, muscle training_x000D_ _x000D_ Selling point: You can adjust and choose different pounds of tension bands for training according to your personally situation_x000D_ _x000D_ Weight: 445g; length of rubber tube: 120cm 1According to the personally situation, you can adjust and choose different pounds of tension _x000D_ _x000D_ belt for training 211-piece set: tension _x000D_ _x000D_ belt x5, handlex 2. foot rings bucklex2.safety door buckle x1. storage pocketx1 3Function: fitness and body, muscle training 4Yellow 15 pounds (5 * 8 * 1200), green 25 pounds (6 * 9 * 1200) 5Red 20 pounds (5 * 9 * 1200), Blue 30 pounds (5 * 10 * 1200), Black 35 pounds (5 * 11 * 1200)Product list: Tension belt * 5 Handle * 2 Anklet * 2 Safety door buckle * 1 Storage beam pocket * 1 Instruction manual * 1Adjust rubber pipes of different pounds for training according to your own situation