Dog Cat Flap Door with 4 Way Security Lock

Feature: Interior and exterior cat doors: Let your cat enter the litter box or outside through any interior or exterior door, while keeping dogs and children out Designed to fit your cat: High-impact white plastic frame with clear hard flap is designed for your cat's preferences and easy to use Easy to install: The set includes 8 screws and their covers, allowing you to easily install in windows, doors, cabinets, panels and walls, etc. Excellent Quality: Made of ABS material, weather resistant, smooth and durable surface. After installing the cat door, please tear off the protective film of the cat door panel. Specification: Material: ABS 4 Way Locking: No in & No out( Fully locked) Free in & Out( Fully open) Size:  S: 19.7*19*2cm /7.75*7.5*0.87in M: 19.7*19* 5.3cm /7.75*7.5*2in L: 25*23.5*5.3cm/9.8*9.25*2in  XL: 27.7*25*5.5cm/10.9*9.8*2.1in Note: 1 inch=2.45cm/1cm=0.393 inches. Size S is slightly different from other sizes. It's "thinner". Due to the different monitor and