The Small Patio Pet Door is suitable for most sliding door openings, extendable from 44.4” up to 84.25”. The flap opening measures 7.09” wide by 9.25” tall making this insertable pet door ideal for most cats, Yorkies, Maltese, Papillons, Chihuahuas, Pomeranians, French Bulldogs. No tools required for install, this pet door is perfect for renting with pets or for homeowners that don't want to make a permanent change to their home, just install and remove the pet door as needed. The flap measures approx. 1.26” high from the ground, to increase the height for taller pets use a Patio Pet Door Extension (sold separately). Durable powder-coated aluminium construction with sturdy fiberglass mesh panels keeps insects out while still allowing fresh air in. Give your pets the freedom to roam with the Hakuna Pets Patio Pet Door.