The Screen Mesh Patio Pet Door is suitable for most sliding door openings, extendable from 44.4” up to 84.25”. The flap opening of this insertable pet door is ideal for most dogs, cats, and more. No tools are required to 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. Durable powder-coated aluminum construction with sturdy fiberglass mesh panels keeps insects out while still allowing fresh air in.