Make sure this fits by entering your model number. Sports & Fitness - Our Jump ropes are perfect for Fitness Workouts, Warm-up exercises, Aerobic training, Skipping, MMA, Boxing, Speed training and Endurance training, while help you build up your muscle tension, improve cardio endurance and physical vitality, burn fat, Bring you a healthy life. Soft Jump Rope - Our jump rope is made of high quality polyester and covered with silicon protective case to ensure maximum service life. The rope is 9.84 feet long and 0.31 inches(8mm) in diameter, 0.5 lbs weight.