Homdox Plastic 4 Way Locking Lockable Pet Cat Door Small Cat Flap White (Large) White cat door gives your cat the freedom to come and go without bothering you. It can be used as a indoor cat door or outdoor cat door,4 Way Locking: Open, Fully locked, Out only, In only. Transparent flap lets you and your pet see what's on the other side of the door.With the pet screen door you will feel safer for your pet. The cat door has a seal around it so that the door closes and keeps it shut nicely. Two size for you to choose, M Frame Size: 7.7 x 7.4 x 2.0 inch; M Flap Size: 5.5 x 5.1 inch; L Frame Size: 9.8 x 9.2 x 2.0 inch; L Flap Size: 7.0 x 6.4 inch.