Elitexion 100pcs 9" Bungee Ball Tarp Tie Down Cord - Black Color Packs of 100pcs Bungee Ball Cord in Black Color. They are 9" in length. Quick and simple to use. Long lasting rubber. Feed the elasticized loop through the tarp grommet and wrap around the ball. Plastic toggle balls on either end of the cord. It's ideal for stretching tarps on canopy frames. High quality cord with extra stretch that makes them easier to attach and remove.