... W.: 7.5kg/7kg7.we supply the specification length 2.7-2.8m8.MOQ:1000PCS9.Function: skipping the whole body movement, ... at the same time the exercise and development, so long rope skipping can prevent such as obesity, insomnia, arthritis, osteoporosis, high ... , jumping rope is an intense sport, exercise should be placed on the preparatory activities in various parts of the body. Speed Jump Rope