Replacement dog door flap with a cutout design that fits your pet's door, providing a secure barrier to keep flies and debris out. DIY installation helps you avoid the cost of a professional while giving your four‑legged friends the protection they deserve. Key benefits Keeps flies and debris out while allowing easy pet access Cutout design fits your pet's door for a secure, selfcontained installation DIY installation saves on professional installation costs Safe and durable Made from PVC, safe and odorless for home use Weatherproof and resistant to deformation, designed for longterm performance Special design and compatibility Transparent blue color enables visibility for your pet as they pass through Designed to fit most standard cat flaps, offering flexible applicability for diverse doors Easytoinstall design suited for replacement on existing openings Easy replacement and installation Two overlapping sides provide additional insulation Measure and cut to fit your opening Drill 23 holes in each strip and secure with screws for a precise, secure fit Use scenarios Replacing a worn or damaged flap on an exterior pet door to restore insulation and keep insects out Upgrading a standard cat flap to accommodate a dog door while maintaining a weather seal DIY replacement to avoid professional installation and fit for your door opening