SPECIFICATIONS  Material：rubber Color&power：yellow（15LB），red（20LB），blue（25LB），green（30LB），black（35LB） Resistance band*1 1.Rubber tubing offers you more resistance for a full upper body workout including arms and shoulders. 2.Portable and light weight, easy to storage and can be used anywhere anytime; Workout in the privacy of your home, hotel room, office, or even outdoors.