Teh Carlson Maxi Pet Gate with Pet Door expands from 37 to 60 inches to accommodate extra wide openings all around the house. Can expand to an incredible 13 feet wide with the use of additional 24-inch extensions. Convenient walk-through design has an easy, one-touch release handle. Patented pet door is 10 inches by 7 inches to let small pets pass through, while everyone else stays put. Simple wall mounts are easy to install and remove. All-steel construction is sturdy, durable, lead-free, non-toxic and chew-proof.