Uh oh, did your dog door flap get chewed up or worn out? Don't replace the whole unit - just snap in this replacement flap and you're back in business! This thing is specifically designed to fit PetSafe PAC11-11039 models perfectly, measuring 10 1/8\ wide x 16 7/8\ high. The reinforced screw holes with grommets and washers mean they won't tear out even if your pets are going crazy running in and out all day. The bottom magnet is strong enough to snap the flap shut after your pet comes through, keeping out wind, rain, and bugs. It handles extreme temperatures from -58°F to 122°F without curling up or getting stiff. Made from premium BPA-free material that's safe even if your curious pet decides to give it a chew test. Installation is stupid simple - just a screwdriver and about 5 minutes of your time, no professional help needed. Comes with the flap and 10 screws so you have everything you need. Seriously, if your current flap is looking sad, this replacement will make your pet door work like new again without breaking the bank!