The Magnador two-way plastic pet door provides complete come-and-go freedom for your pet without the worry of the door staying open when not in use. U.S.A. 13in. x 20in. opening designed for dogs over 50 lbs.; overall dimensions 17in. x 24in. Magnetic closing system keeps door closed when not in use Prevents unwanted rodents and insects from gaining access to your home Weatherproof high-impact polymer construction Door can be locked Permanent magnets installed on door and frame Easy installation; all hardware included