Dog Door for Wall, Medium Dog Door with 3-Flap, Aluminum Doggie Door, Heavy Duty Pet Door with Lock, Telescoping Tunnel for Interior Exterior Wall, Pets Up to 45LB is up for auction in Pet Supplies. The current bid is $3.50, 96% below the $99.99 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.