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 surprised for not replacing that old pet door sooner. 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 or dog door to keep outside weather from entering. Compatible With Many Doors: 2 sizes of replacement flap to choose from. Medium is approximately 32.2x20.5cm; Large is approximately 43x26cm. Specifications: Material: TPU Color: As shown in pictures Size (Approx): M - 32.2x20.5cm L - 43x26cm / 16.93x10.24in Weight (Approx): M - 225g L - 430g Note: 1. Please allow 0-1cm error due to manual measurement. Please ensure you are okay 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 or Large)