The Carlson Mini Dog Gate with Pet Door, at just 18 inches high, is the perfect gate for small breeds and puppies. Expands from 29 to 32 inches wide. Add the included 6-inch extension and expand your gate to 38 inches wide. Small pets pass through the patented 10-inch by 9-inch pet door while you comfortably step over the gate. Pressure mount system makes set-up quick and easy. All-steel construction is sturdy, durable, lead-free, non-toxic and chew-proof.