The PetSafe Classic Dog Door has a heavy duty aluminum frame built to withstand the stress from even the most powerful breeds. Great for giant breed dogs. Use for door or wall entry.

FEATURES:

* Soft transparent single flap for maximum energy efficiency
* ULTRASEAL(tm all weather, energy conserving flap system reduces energy loss in winter and summer
* GRIP-TRAK(tm) insulated, locking security cover is the strongest and most secure available (Extra large comes with a steel security cover)
* Telescoping adjustable frame creates its own protective inner frame in doors from 1/16" to 2", may also be installed in walls
* Adjustable sill with extra strong magnets hold the flap in place for a tight weather seal
* Insulating, non-rusting security cover has dual locking pins to prevent removal of the security cover from the exterior
* See-through flap design aids in training
* Easy-to-follow installation manual
* Lifetime warranty on door frame, One year on flap

Big dog size XL: 13 3/4" x 23". For dogs up to 220 lbs.

White frame

How to measure for door size:

Step 1. Measure your pet from the top of the shoulders to the chest, just behind the front legs. Then measure the width of your pet at the widest point. This will be either the shoulder or hip area.
Step 2. Determine your pet's weight.
Step 3. Select the correct door size based on your pet's measurements and weight. You will need a pet door with an opening size that is bigger than your pet's measurement.