Add additional 20-gauge wire and flags to increase your fence area. This kit will complement the wire and flags that come with your in-ground pet fencing system. Use the flags to train your pet, then remove them after training. Save the flags in case you add a new pet to the system or your pet needs more training sessions in the future. We recommend keeping a flag or two in your yard to let neighbors and passerby know that your pet is safely contained. Also included are 2 gel capsules and connectors to splice and repair broken boundary wires.How much wire do I need for an in-ground fence?