Amazon Basics Dog and Puppy Pads, Leak-proof 5-Layer Pee Pads with Quick-dry Surface for Potty Training

Heavy-duty, slim profile frame with “built-in” telescoping tunnel to fit wall thickness of 4-1/4” to 9-1/4” – no separate wall kit or parts to buy! Extra Large features 9-3/4″ x 17” Flap Size (for dogs 36-90 lbs).
Installs easily into all types of interior and exterior walls including drywall, plaster, wood, aluminum or vinyl siding, stucco, brick and even concrete and includes all hardware, 3/16” masonry drill bit and cut-out template with easy to follow step-by-step instructions. Frame can be painted to match existing wall color.
Features two replaceable flexible vinyl flaps for maximum insulation and energy efficiency. An animal lock-out slide is provided for added insulation and control of your pet’s access.