Yes4All Premium X-Safe Resistance Band w/snap-block technology (WHILE OTHER UNSAFE DESIGN WILL HURT YOU) 10, 15, 20, 25, 30, 40, 45, and 60 lbs single & set Dumbbells alternative - perfect for building muscle. Imported Include a single 48" long twin-tube resistance band permanently attached to 2 handles. The set comes with one door anchor. Patented X-Safe technology - Workout with confident (see illustrated image) Best in class components & material on Amazon Guaranteed. Heavy duty components and multi-dip Malaysian latex - the highest latex source. Come with door anchor. The band resistance is from 0 - 40 lbs when you pull it out aproximately 2X from its original length