Medium, 13.75"; W X 17.5"; H, For Dogs up to 40 lbs. Manufactured to be strong, safe & energy efficient. Snug weather seal provides superior draft control. Shatter resistant dual-thermo pane plexiglass panels reduce A/C & heat loss.
- Opens with a gentle push & automatically closes tightly without banging
- Can be installed into stud, brick, block or cement exterior walls up to 12 inches thick
- Comes with a lock & key & steel security plate
- Virtually impossible for an intruder to enter your home through pet door