The Ideal Pet “Hefty Kat Door™” with 7-1/2” x 10-1/2” Opening Designed For Large Cats up to 25 lbs! Features Include: Transparent Unbreakable LEXAN® 7”x 9” flap with 2-way operation. LEXAN® is a registered trademark of General Electric Weatherproof design for Exterior or Interior use. Easy installation. Availability: Usually ships the next business day. Ideal Hefty Cat Door IDLHFTKATRegular price: $42.00Sale price: $39.95 Ideal Hefty Cat Door, Large Cat Door, Cat Door for Fat Cats