The Ideal Pet Products Designer Series Ruff-Weather Pet Door is Designed for standard door installation. It's sturdy frame and double flap design withstands all types of weather condition. The double vinyl flap creates a 3-inch air pocket that provides heavy duty insulation and keeps out drafts to maximize energy efficiency in your home. The heavy-duty grey plastic frame can handle the toughest daily use, plus it's easy to install and includes a die cut template with easy to follow instructions and all hardware.