Features:

• 100% brand new and high quality.
• Cat and dog doors, plastic pet doors.
• The outer sealing ring prevents rain and water from entering.
• There are 3 sizes, and there is always one size that fits your pet.
• Easy to install and fits all doors, panels and walls. 
• Material: ABS
• Color: Black, White
• Suitable for: Dogs and cats

Installation method:

• Tools required: Electric drill, iron saw or chainsaw, measuring ruler
• Step1: First draw the dimensions of the door cover with a piece of paper (there may be a few millimeters of error).
• Step2: The drawing makes good compare on the door is good, draw good mark with pencil.
• Step3:
  The 4 corners of the door that draw good drill a hole first
  respectively, begin to dig a hole directly if have electric saw next.
• Step4: If it is a glass door, use a tool to scratch the glass, gently scratch it open and fix it with glass glue.
• Step5: The hole was pulled out, do a layer of wood skin to wrap around the hole first now, for beautiful.
• Step6: Install cat door, have accessory screw, screw with screwdriver.
• Step7: Screw mouth still has screw cover, it is ok to press.

Outer door frame size:

• M: 19*19.7*5.3cm
• L: 25*23.5*5.3cm
• XL: 25* 5.5*27.7cm

Inner door frame size:

• M: 16*15.7cm
• L: 19*18cm
• XL: 22*20cm

Package included:

• 1 x Pet Door