1. Features: - Great Fit For Door: Flap Only. Features 4 holes at the top of the flap for perfect alignment. - Quick Easy Installation: Installs in just minutes with only a screwdriver. It is easy, you will be kicking yourself for not replacing that old dog's door soon. - Material: This flap compatible with Cats Door and Dog Door is made from flexible, durable, weather resistant TPU-materials. - Weather Tight & Weather Resistant: Magnetic strip at the bottom of the flap securely connects the flap to the magnetic interfaces at the bottom of your cat's door / dog's door to keep outside weather from blowing inside. - Compatible With Many Doors: 2 sizes of Replacement Flap to choose. Medium is about 32.2x20.5cm; Large is about 43x26cm. 2. Specifications: - Material: TPU-Material - Color: As Pictures Show - Size (Approx.): - M-32.2x20.5cm - L-43x26cm/16.93x10.24in - Weight (Approx.): - M-225g - L-430g 3. Note: - 1. Please allow 0-1cm error due to manual measurement. Please make sure you do not mind before you bid. - 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks 4. Package includes: - 1 Piece Dog Door Flap Replacement (Medium/Large)