SME Self-Healing Dueling Balls w/ Rope and Chain. Dueling Balls by SME are some of the most durable on the market offering all calibers an entertaining shooting experience. No assembly required these SME Targets throw the balls on the ground and you're ready for shootout If you're using the SME 4in Self-Healing Dueling Balls as part of a competition the dual colored design is great for game play. A durable rope and chain are included with these SME Self-Healing PVC Targets and they easily hang in the trees. These make for fun spectator sport at any range especially during the holidays. Who knows these might even become a new favorite pastime. Specifications for SME Self-Healing Dueling Balls: Manufacturer: SME Included Accessories: Heavy Duty Rope and Chain Diameter: 4 in Package Contents: SME Self-Healing Dueling Balls Heavy Duty Rope and Chain SME SME-BBC: Self-Healing Dueling Balls w/ Rope and Chain