The SportDOG™ Wire & Flag Kit allows you to cover an additional 1/3 acre with your SportDOG Brand ® In-Ground Fence™ system. The kit comes with a spool of 500 feet of wire, a bundle of 50 boundary flags, 2 wire nuts, and 2 waterproof gel-filled splice capsules. Use the flags to train your pet, then remove them after training.