https://www.petdoors.com/products/custom-double-flap-dragon-pet-door-for-aluminum-sliders?variant=43542928916715 Cat Mate White Large Cat FlapSpecially developed for the largest cats or small dogs a good-sized door with a gloss rigid frame that is both sturdy and easy to clean. Screws are hidden with push-in plugs. (Yorkshire Terriers, Pekinese, Dachshund, etc.) up to a shoulder height of 14" (360mm). https://www.petdoors.com/products/endura-flap-single-flap-pet-door-for-thin-doors-2022-design?variant=43616813089003

You will need a glass adapter to install its version into double glazing. Or to go through walls you will need tunnels The standard tunnel covers 20mm to 50mm, but for thinner panels the outer tunnel can be carefully cut as required. Perfect Fit for Feline Friends and Small Canine Companions: Our cat flap is not only suitable for large cats but also small dogs up to a 14-inch shoulder height. It's ideal for breeds like Yorkshire Terriers, Pekineses, Dachshunds, Miniature Poodles, and Spaniels, offering them a secure and convenient access point while keeping unwanted animals out.The Cat Mate door is battery powered and will give approximately 12 months operation from 4 x AA batteries (not included). Do make sure that your cat’s microchip is one that’s recognised by the cat flap you choose. Some older microchips and foreign chips may not work with a microchip cat flap. Where should I install my cat flap?

Silent Operation for Peaceful Living: Say goodbye to noisy disruptions! Our cat flap is designed with silent action, ensuring smooth and quiet operation. Your pet can pass through without causing any disturbances, allowing you and your furry friend to enjoy a peaceful environment. The large flap size also accommodates even the "fluffiest" of kitties, making it a favorite among those with larger pets. It is possible to install the two halves on either side of your wall for an interior cat door, however there is no cat mate 221 wall liner, so you would need to find a diy way to build a tunnel and attach the frames, making sure to caulk the edges to prevent water leaking into the wall. The Cat Mate 234/235 is a similar smaller product that can be installed in walls. Cat flaps in general are a godsend for those of us who are servants to moggies, meaning we don’t have to get up and down every five minutes to let a cat in or out through a window or door. Allowing cats access to the outside world, in a safe environment, gives them the best life possible, so it’s worth investing in a good cat flap to let them come and go as they please.

The best microchip cat flaps you can buy in 2023

For our trade customers, we have left the screw caps in these pictures so you can easily see the fixing points. the fixings and screw caps are supplied in the box. The Cat Mate 221 Large Cat Door is a top cat flap for those seeking a versatile and efficient solution for their furry friends' comings and goings. With its generous 7" x 7" flap, this pet door accommodates large cats weighing over 20 pounds and small dogs up to 14" shoulder height. It's perfect for indoor or outdoor use, giving your pets the freedom to explore while you enjoy peace of mind. The LED indicator flashes with a short pulse every 30 seconds when the batteries are in need of replacement. https://www.petdoors.com/products/endura-flap-builder-series-pet-door-for-walls?variant=43919441625323