Compatible with the La Luna Patio Pet Doors, these unique extension pieces are for sliding doors over 211cm tall. Each piece adds 12cm of height, and you can use as many as needed. The support bars ensure security without compromising it. Simply slide the extension piece onto the support bars, screw them together and the pet door will remain adjustable. 

Please note: If you have a screen door adapter, you will need to purchase both this extension, as well as an adapter add on.