The Small Black Mesh Sliding Pet Door is designed to fit most sliding door openings, extending from 4'7" up to 7' (1.4m - 2.14m). Installation is tool-free, making it a great choice for renters with pets or homeowners who prefer not to make permanent changes - simply install and remove as needed. To lock up your home, just remove the pet door from the door track and close and lock up your door as normal. The pet door flap is approximately 1.4" (35mm) above the ground, for taller pets, this can be raised with extensions (sold separately). Made from durable powder-coated aluminum and featuring strong fiberglass mesh panels, this pet door keeps insects out while letting fresh air in. Provide your pets with the freedom to roam with the Hakuna Pets Mesh Sliding Pet Door.