PetSafe Dog Door for Screen Door – Size Large – for Dogs and Cats up to 100 lb – Use in Screen Doors – Window Screens and Porch Screens

ENCOURAGE EXERCISE AND INDEPENDENCE: Give your cats and dogs freedom to go in or out without asking for your help to open the door—perfect for potty breaks or play time QUICK, DIY INSTALL: Snaps directly into your existing screen door, window or porch screen for easy installation, and blends perfectly with your existing screen DURABLE DESIGN: High-impact plastic frame surrounds a strong mesh that is puncture and tear-resistant for long-lasting use; large door is reinforced with fastening screws SAFE AND SECURE: Large door has sliding wind-locks that are strong enough to resist flapping open in the breeze but not so secure that your dog can’t run through; small door locks to prevent entry STORM DOOR/WINDOW/PORCH COMPATIBLE: Works with most metal or vinyl coated fiber screens DIMENSIONS: For pets up to 100 lb; flap opening size is 10 1/4 in W x 17 1/8 in H; measure your pet to ensure comfortable use U.S.-BASED CUSTOMER CARE: Our pet product experts are here to help you and your pet and are available by phone, email or chat if you have any questions