When the dog goes out, the entire assembly opens up about the mounting bar's hinges. When the dog returns, the frame stays and only the acrylic panel passes through the wall/door allowing the dog back inside with the use of the hinges attached to the panel.
Unique Two-Way Design
¼” Clear Acrylic Chew-Proof Panel
Heavy Duty Spring Hinges
Weather-Tight and Energy-Efficient
Door Frame Size: 14" x 20"
Door Opening Size: 12-1/2" x 17-1/2"
Lifetime Warranty includes chewing
Made in the USA!
Easy to Install:
Hardware included: Only 2 Screws needed
12.5" x 17-1//2" opening required
Where to create the Opening:
Measure the distance from the ground to the lowest part of the dog's chest
This is where the opening will start and go up 16-1/2" from here.