1.) Medium Size: 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，Suitable for any wall or door that is up to 50mm thick; 2.) Perfect Cat Door: A great solution to give your cat access to any interior room, while giving you complete control; Perfect for access to the bedroom or even food or the litter box when kept behind closed doors to keep the dog and kids out. 3.) Thoughtful Design: Transparent flap let pet see through the door. Exterior screen is for waterproof. Brush strip reduces noise from the door closing; 4.) Easy To Install: Complete instructions included, make you easily install in windows, doors, cupboards etc; 5.) 4 Switch Modes: Switches-swing out only, in only, both in and out, and fully locked, easy control of your pet's in and out; Specification: 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 Provides easy access for your cat to any interior room Perfect for keeping food or litter boxes behind closed doors, away from dogs and kids Transparent flap allows pets to see through the door Exterior screen is waterproof for added durability Brush strip reduces noise from the door closing