Ideal Pet Deluxe Aluminum Pet Door White, Super Large

It's a good fit for larger dogs. Allows easy home entry and exit for your pet. Forms a threshold-level seal. Spring-loaded lock-out slide included for blocking the passage. Ideal Pet products dog door fits doors 0.5" to 1.75" thick. Suitable for dogs weighing 91 to 120 lbs. Dimensions: 15" x 20".