Suggested Retail:$30. Purrfect Portal XL Pet Cat Door for Interior Doors :: Molded Plastic Kitty Cat Pass for Large Cats up to 30 Lbs :: Installs in Minutes, Stays on Securely, Easy to Follow Instructions + Hardware, White. LARGE CAT DOOR FOR BEEFIER BREEDS: Own a bigger kitty like a Maine Coon, Burmese, Egyptian Mau? This extra-large cat door fits even the heftiest cats (20-30 lbs.), thanks to its 8.7"x11.45" opening.. 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. PAID DELIVERY AND 7 DAY ALTERNATE PICK-UP ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.