Feature 1、For All Strength Level：Set of 4 pcs Pull up assist bands correspond to different colors, Red(15-25 lbs), Black(25-50 lbs), Purple (35-80 lbs), Green (50-120 lbs),81.9 inches in length and each color is different resistance and width for more training you want. 2、Suitable for Any Workout：Our resistance bands offer effective training. These exercise bands are ideal for pull up assistance, adding resistances to press-up, speed training, bench press, squat to work out your arms, shoulders, chest, gluteus, legs etc. 3、High Quality Materials: These power board kits are made of high quality rubber, which is comfortable and environmentally friendly. Product description Circumference: 2080mm Thickness: 4.5mm Width: Red: 13mm, Black:21mm, purple: 32mm, Green:45mm Applicable scenarios: press up, speed training, bench press, square Applicable parts: arms, shoulders, chests, glutus, legs Products include 1 * Resistance bands Notices: 1. Please allow 1-2mm differs due to manual measurement, thanks. 2. There could be some slight differences in the color tone of the pictures and the actual item.