Need Help Finding Your Size? Not sure which flap size you need? Most customers already own a JGM Pet Door but aren't sure of the size name. Instructions: Measure the clear flap opening (not the entire frame) from side-to-side and top-to-bottom. Still unsure? Call us at (602) 738-3667 before ordering. Restore the performance of your JGM Pet Door with our Replacement Flap Kits - designed to maintain a secure, weather-tight seal. Each kit includes: Replacement flap(s) (extreme temperature pvc vinyl) Weatherstripping for insulation Magnets for an airtight seal Tunnel carpet for added durability and comfort Installation screws and step-by-step instructions Note: Flap kits are size-specific and must match your original JGM Pet Door model. Be sure to select the correct size when ordering. Warranty: This product is covered under JGM's 5-year Pro-Rated Warranty. Warranty claims require verification and are not applied automatically at checkout.