Ideal Pet Products Ruff-Weather Pet Door Extra Large Doors The non-toxic warmer is safe

The non-toxic warmer is safe and stays warm for up to 12 hours inside a pet's bed

WiseWire® is a heavy duty

Optional extension is available for openings up to 47

Great for animals who love to nest while they sleep

Waterproof for use anywhere outdoors

Ideal Pet Products Ruff-Weather Pet Door Extra Large Doors The non-toxic warmer is safeThe Ruff Weather Pet Door was designed to handle all types of climate conditions, while boasting great energy efficiency, thanks to this door's double flap feature! Structural foam plastic frame that adapts to doors ranging from 3 4" to 1 3 4" in thickness. Double, flexible clear vinyl flaps create a 3 inch air pocket for maximum insulation and energy efficiency. Optional Ruff Weather Pet Door Wall Kit is designed for installation in walls from 4 3 4'