Standard kits
Each of these standard kits will produce a reliable no-chew, no-climb cat fence. Available in lengths of 50, 100, 150, 200, and 300 feet, they come with 6, 9, 12, and 20 posts, respectively. Their extender arms bend down about 6 inches; so if you feel your cat might jump 5.5 feet, or if you dislike the idea of bending to pass through the gate, get a 7.5-footer.