PetSafe small Pet Screen Door, Dog and Cat Door for Screen Door, Window and Porch Use.

Easy to Install - small size door installs directly onto existing screens in your home for quick and easy outdoor access for your dog or cat
Built to Last - Added screws hold the large door firmly in place to stand up to wear and tear from larger pets
Storm Door, Window and Porch Compatible - Works with most metal or vinyl coated fiber screen storm doors, window screens or screened-in porches
Durable Screen Mesh Material - Specially designed mesh material is safe and durable for pet use; puncture and tear-resistant
Safe and Secure - Large size door has durable high-impact frame reinforced with screws; with light sliding locks designed to prevent flapping in strong winds
Size Information - For pets up to 20lb.