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 glad you replaced that old pet door. High-Quality Material: This flap compatible with cat doors and dog doors is made from flexible, durable, weather-resistant TPU materials. Weather Tight & Weather Resistant: Magnetic strip at bottom of flap securely connects to the magnetic interfaces at the bottom of your cat door / dog door to keep outside weather from blowing inside. Compatible With Many Doors: 2 sizes of replacement flap to choose from. Medium is approximately 32.2 x 20.5 cm; Large is approximately 43 x 26 cm. Specifications: Material: TPU Color: As shown in pictures Size (Approx): M - 32.2 x 20.5 cm L - 43 x 26 cm / 16.93 x 10.24 in Weight (Approx): M - 225 g L - 430 g Note: 1. Please allow 0–1 cm error due to manual measurement. Please ensure you are comfortable with this before purchasing. 2. Due to differences between monitor displays, the picture may not reflect the actual color of the item. Package Includes: 1 Piece Dog Door Flap Replacement (Medium/Large)