The Plexidor PDDOORSMWH White Door Mount Pet Door Unit - Small uses unique shatter resistant, dual thermo-pane plexiglas panel that opens with a gentle push and automatically close tight without banging. Using a snug-fitting high density nylon weather seal, the Plexidor PDDOORSMWH door panels are designed to provide superior draft-control, keeping heating and cooling in the house. The Plexidor PDDOORSMWH interior and exterior frames are made from heavy duty anodized aluminum that won"t rust, bend, crack or warp. Features: * Rigid, high-impact, insulated and shatter-resistant panels do not require costly vinyl replacement flaps and create a window for your pet * Panels open smoothly with gentle push and close automatically allowing large and small animals to use the door with ease * Designed for doors that measure 1-3/4-inch, which is the thickness of a standard exterior house door * Anodized aluminum interior and exterior frames won’t rust, crack, or warp * Steel security plate can be used during vacations and periods of non use * Use for cats up to 24 pounds and dogs up to 9 pounds * Keeps out unwanted guests with cylinder lock * Opening of 6-1/2-inch Wide x 7-1/4-inch High * Cut Hole of 8-1/2-inch Wide x 8-1/2-inch High * Overall: 10-inch Wide x 10-inch High * Security with lock, key and steel security plate * No replacement flaps required * Highest energy efficiency What"s In The Box: * White Interior and Exterior Frame * Installation Instructions * Mounting Hardware * Two Keys * Lock * Steel Security Plate Not Included