[Natural Late] ur heavy are made f 100% high-grade natural rubber t bear high tensin. It will nt break, safe and prvide lnger durability. [Yur Mvable ] The resistant set is prtable and cme with a waterprf bag fr yu t carry it anywhere, s yu can use this set t eercise, be it t yur hme, r even as yu travel therefr yu can cntinue with yur wrk. [Custmer Friendly service] If yu have any prblems, please d nt hesitate t cntact us. We will prvide prfessinal service t slve yur prblem. [Fr All Strength Level] Set f 4 pcs Pull up assist crrespnd t different clrs, Purple (60-100 lbs), Green (100-125 lbs),Blue (125-170 lbs), range (170-250 lbs),81 inches in length and each clr is different resistance and width fr mre training yu want. [Suitable fr Any Wrkut] ur ffer effective training. These eercise are ideal fr pull up assistance, adding resistances t press-up, speed training, bench press, squat t wrk ut yur arms, shulders, chest, gluteus, legs etc.