Jump ropes for fitness are made of strength polyester material, double braid craftsmanship,thick and , sturdy and , not easy to break or wear the ropes for working out measure . 2.8 / 9 ft in length, there are 2 different sizes in diameter, the green rope measures . 10 mm/ 0.39 inch in diameter, and the black rope measures . 12 mm/ 0.47 inch in diameter, different sizes can your different training needs, you can exercise with and friend the ropes for exercise can be adjusted to the ideal length according to your workout needs, first stand on the rope, pull up to fit you, then tie the rope, suitable for athletes, runners, beginners, general exercisers and fitness enthusiasts the gym rope is practical for high intensity training workouts, helping to your muscles and body, allowing you to and relieve stiffness after a day of work or study, suitable for men and women, making your workouts have . size:2.8m Material: Polyester colour: Black+Green Package Contents: 2 x jump rope (green jump rope 10mm diameter, black jump rope 12mm diameter) 2 x storage bag (Note: Random , 't accept the specified .) Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.