Door for Pets with 4-way Locking System

The following modes are available that can be adjusted by sliding the lock on the bottom of the door.
One way from inside to outside. The pet can get out but cannot get back in again (for preventing other pets from entering).
One way from outside to inside. The pet can only enter from the outside and cannot get out again.
Completely open. The pet can get in and get out at will.
Locked from both sides. The pet cannot get in or get out.
Easy to install and suitable for any wall or door that is up to 5 cm or 2″ thick.
Suitable for cats and dogs.

Specifications:
Material ABS

Small:
Outer size:
Length 19cm and 7.4″
Thickness 2cm and 0.7″
Height 20cm and 7.8″

Inner size:
Length 14.7cm and 5.7″
Height 15.5cm and 6.1″

Suitable for glass doors and windows

Medium:
Outer size:
Length 19cm and 7.4″
Thickness 5.5cm and 2.1″
Height 20cm and 7.8″

Inner size:
Length 14.7cm and 5.7″
Height 15.5cm and 6.1″

Large:
Outer size:
Length 23.5cm and 9.2″
Thickness 5.5cm and 2.1″
Height 25cm and 9.8″

Inner size:
Length 18cm and 7″
Height 19cm and 7.4″

Installation method:
First, use a piece of paper to draw the size of the door cover (there may be several mm errors).
Make a good drawing on the door, draw and print with a pencil.
In the four corners of the painted door, drill a hole with a drill, and then directly start to dig the hole if there is an electric saw.
If it is a glass door, use a tool to scratch the glass, gently open it and fix it with glass glue.
Now we have to make a layer of wood skin around the hole to make it beautiful.
Install the cat door with accessory screws and screw them on with a screwdriver.
Screw mouth is also equipped with screw cover, press on, OK finished!

Notes:
The real product colors may be slightly different from what you see in the images.
The product dimensions may be slightly different from what is written in the product specifications.