Revletics Speed Rope with Carbon Fiber Handles - Ultra Smooth for Mastering Double Unders (Pink, Purple, Blue, Silver, Black, Red, Gold). Made from light, aerospace grade parts for ultra performance, the Revletics speed jump rope is one of the lightest on the market. 5" Carbon Fiber Handles provide ultra light weight Aircraft Aluminum Spinner for light, smooth movement Durable Specially Coated Nylon 6/6 with Galvanized Steel Interior Cable in two sizes. The 3/32in thin cable is lighter, faster, and usually better for advanced athletes; indoor use recommended. The 1/8in thicker cable is designed for beginners who require more feel of the rope motion and outdoor use. Adjustable Length for the perfect fit & replaceable cable