Extra Large, White, Pet Door, Solid Aluminum Construction, Locking Panel, Transparent Single Flap For Weather Tight Seal, Easy Do It Yourself Installation, Fits Doors From 3/8" To 2" Thick, Flap Opening Dimensions: 13-5/8" x 23", Cut Out Size: 14-3/8"W x 25-1/4"H, Great For Pets From 12 LBS To 220 LBS.