Note: Outer Size: 7.5" x 7.8" x 2" ( W x H X D); Inner Size: 6.1" x 6.3" ( W x H) Cut-Out Size: 6.3" x 6.7" (W x H); Fit Cats up to 16 lbs The waistline less than 15.75" ) Suitable for any wall or door that is up to 50mm thick; Material: ABS plastic Color: White Style: Flap Weight: 0.35 kg 4 Way Locking: No in & No out( Fully locked) Free in & Out( Fully open) In only Out only Function Instruction of the Switches: Turn Red and Green switches to both sides, pet is prevented from entering or exiting house. Turn Red and Green swithes to right side, pet is allowed to enter house, but prevent from exiting house. Turn Red and Green switches to left side, pet is allowed to exit house but prevent from entering house. Turn Red and Green switches to middle, pet can leave and exit any time. Package Includes of Medium Car Door :1 X Medium Cat flap door;8 X Screws;8 X Screw caps;1 X Installation instructionNote: There are total 8pcs screws, 4pcs used on the front and the rest used on back.