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Ideal Pet Products Medium Ruff Weather Pet Door$30.99
Features : Optional pet door Wall Kit is designed for installation in walls from 4-3/4" to 7-1/4" thick, sold separately. Structural foam plastic frame that adapts to doors ranging from 3/4" to 1-3/4" in thickness. Energy efficient Double Vinyl Flap design creates 3 inch air pocket for maximum insulation.
Weatherseal & Nylon Window Pile for added insulation.,Features : Optional pet door Wall Kit is designed for installation in walls from 4-3/4" to 7-1/4"