Features:

•   Self-framing adjustment range of  ¹/₁₆" - 1 ³/₄" (Small);   ³/₈"-2" (Medium, Large & XLarge)
   
•   Liner made of stiff brown plastic is cut with scissors to fit the depth of the door.
   
•   Plastic locking cover mounts from in front of pet door so it doesn't interfere with a door knob or other protrusion above it.
   
•   Vinyl flap has a 'bellows' area on each edge designed to help preserve a seal in cold weather.
   
•   Flap attachment screws are fitted in slots allowing precise up-and-down adjustment.
   
•   Magnetic threshold pops up to meet flap at the bottom for improved seal.
   
•   Plastic frame is non-corrosive especially in environments near salt water.

This pet door is similar to the PetSafe Freedom metal framed pet door.

PetSafe Plastic Pet Door
Large Size