Buddy Lee Replacement Cord-Black Replacement Cord for your Buddy Lee Hyperformance Jump Rope" or Buddy Lee Rope Master This is the perfect part for children outgrowing, trainers looking to train clients of different heights with the same jump rope, and people who wish to change the look of their equipment with some different colors The cords are 9 feet long and made of PVC, a very durable material that is recommended for wood, rubberized, artificial turf, and sport court surfaces It can be used on cement surfaces but will wear and break quicker due to excessive friction