Fits for Medium Size Pets : dog door replacement flaps is Measure 8 1/8 inch(Width) x 12 3/4 inch(Length), with 4 holes at the top of the flap,and it also can be use as cat door flap replacement Heat and cold resistant : Doggie door replacement flaps will not roll up in high temperature, and will not harden or break in low temperature(-31℉ to 140℉), Perfect for extreme weather Flexible and Durable : Doggy door replacement flap made from flexible, durable materials, Suitable for all seasons, Magnetic strip at bottom of flap, Can suck the bottom firmly Easy to replace with screws: Pet door replacement flap includes 2 flaps and 2 packs of 4 screws, just need a screwdriver and install the flap to the existing pet door frame in minutes Attention: Please check the number of Screw holes on your dog door flap before placing an order, and purchase products according to the number of holes in your dog door flap Upgrade your pet door with our Dog Door Replacement Flaps! Our Doggie Door Replacement Flaps are made of high-quality, weather-resistant PVC that withstands the elements and UV exposure, ensuring long-lasting performance in any season. Simply install the flap to your existing pet door frame in minutes! It will provide them with a comfortable, weatherproof way in and out. Keep your home airy while giving your furry friends the freedom they deserve!