Features 1、QUIET: The pet door adopts quiet brushes, it is not easy to make noise when pets go in and out, suitable for pets of most sizes, convenient for pets to go in and out. 2、ADJUSTABLE: Interior exterior pet door adopts protective plate design, can freely adjust the size of the door to meet different needs, suitable for puppies and cats and other pets. 3、TWO WAY DESIGN: This pet flap door is designed with two way structure, convenient for pets to go back and forth. Special design prevents entry of creatures other than pets. 4、PREMIUM MATERIAL: The cat flap door is made of premium plastic material, sturdy and durable, with no burrs surface to ensure the safety and comfort of your pet. 5、SIMPLE AND STYLISH: The dog flap door has a simple and stylish appearance that blends in with home decor. Easy to install, suitable for wood, cabinet and glass doors, etc. Specifications: Item Type: Pet Door Material: Plastic Size: Approx. Large Size: 43 x 35.5 x 4cm/16.9 x 14.0 x 1.6in Small Size: 34 x 28 x 4cm/13.4 x 11.0 x 1.6in Package List 1 x Pet Door 1 x Door Frame 16 x Accessories 4 x Screws 4 x Nuts 1 x Instruction Manual