RXSG Customer Fit Black ops Jump Rope Buff 3.4 Buff 3.4 – IDEAL FOR BEGINNERS TURNING LESS THAN 50 D/Us. IDEAL FOR ADVANCED LOOKING TO INCREASE INTENSITY. For anyone who does under 50 double-unders in a row. At 3.4 ounces, this is the heaviest cable in our collection, and the added weight gives you added control. By allowing you to feel the tension and resistance of the rope, you have time to jump out of the way, thereby improving your technique and body awareness. Made with the company’s signature aircraft-grade material. Used only once. Bag is included. Normally $55