Burnlab Resistance Band, Use for Pull Up Assist Set of 4About this item 4 bands of different power levels: 4 different power levels: red 15,35lb, black 30,60lb, purple 40,80lb, green 50,125lb. You can use only 1 band or 2 different bands at one time so as to get the power level you want while doing pull,ups or daily workout Gym assistance & daily workout: the bands kit is not only perfect for gym assistance, like pull,ups, power lifting, push,ups, barbell assist and dumbbell assist; but also the best