Pet door for aluminum sliding patio doors comes in two modular sections that easily assembles into a full size patio pet door.Pet door for aluminum sliding patio doors comes in two modular sections that easily assembles into a full size patio pet door. All parts included, nothing extra to buy!Features: Adjustable height for standard aluminum sliding patio door sizes 77-5/8" to 80-3/8". Flap Size: Small - 5" x 7" Sturdy aluminum construction. Available in two colors to match your existing sliding