Feature:1. TOP HOLE DESIGN: There are holes on the top of the dog door flap for adjustment, perfect for large pet doors. Can withstand pets going in and out of the door quickly.2. EASY TO INSTALL: Just one person and a screwdriver can finish the job in minutes. Simple and easy to remove the old door flap and install the new pet door flap.3. FLEXIBLE AND DURABLE: The pet door flap is made of flexible, durable and weather resistant TPU material that won't break in the winter and will last longer.4. TRANSLUCENT: The color of this large dog door flap is translucent, so it won't block your pet's view and adds a stylish modern appearance.5. WIDELY APPLICABLE: Replacement pet door flap for large size aluminum pet doors, deck panel doors, extreme weather pet doors, sliding glass pet doors, in wall pet doors and plastic pet doors.Specification:Item Type: Dog Door FlapMaterial: TPUUsage: Pet Door Replacement Flap.Package List:1 x Dog Door FlapNote:Manual measurement, please allow some errors.