With the Harbinger Speed Rope, just 5 to 10 minutes of jumping will get that heart rate up and the calories burning. The Speed Rope´s solid, dual-corded rope offers a consistent swing motion and won´t stretch out. Solid, dual-corded PVC rope offers a consistent swing motion and eliminates stretching. Molded handles with steel bearings provide a sure grip and a smooth motion. The Harbinger Speed Rope is 9ft. in length and it can be shortened.