Endura Flap Replacement Flaps Flap Size:Extra Large you can purchase foam weather

you can purchase foam weather stripping to seal where the window frame and pet door meet

designed specifically for vinyl-framed sliding glass doors that have Channel-style tracks (will not work with monorail tracks)

Unlike removable pet screens

or people who want to occasionally take out the panel for full use of the sliding glass door

Allows full use of the screen door

Endura Flap Replacement Flaps Flap Size:Extra Large you can purchase foam weatherReplacement flap compatible with all Endura Flap Pet Door models (E2 Design is the same amazing flap, but it comes with different hole covers) Original Design has square joints in the corners and comes with Eight (8) one use hole plugs (4 for original In the Glass pet door models) E2 Design has 45 angled joints in the corners, does not require new screw caps but ships with four (4) reusable screw caps Thermo Panels, Thermo Sashes and New Pet Door Guys