Now your dog can chase bunnies anytime he wants. The Ideal Multi-Flex Dog Door allows your dog to enter and exit your home as he wishes. It"s constructed of sturdy thermoplastic with an inner telescoping frame and it allows easy and secure installation. Dual-pane LEXAN hard panels have an air gap in-between and the flap design prevents ears paws and tails from becoming trapped. The spring-loaded locking slide enables one-handed use and insulation for maximum energy efficiency means that you won"t lose warm air in the winter and cool air in the summer. Overall dimensions - 13.5W x 2D x 18.5H inches. Flap dimensions - 10.25W x 15.75H inches. Hole dimensions - 11.75W x 17.375H inches. Suggested pet weight - up to 90 pounds