options available - color:Black or white.Size:L:Interior: 18cm (W) x 19cm (H), M:Interior: 15.7cm (W) x 16cm (H), S:Interior: 15.7cm (W) x 16cm (H). Safe and well thought out - the transparent flap allows the pet to see through the door. The outer rain seal is waterproof. The brush strip eliminates noise when closing the door. The 4-way smart door control gives the cat more freedom. The inside edge of the frame is polished so that it does not not hurt the cat. 4 Way Switch Mode - The flap door can be customized with 4 modes: exit, entry, entry and exit, and full lock. It provides the cat with maximum freedom as you wish. Easy to install- The nails and mats included in the set allow you to easily install it in windows, doors, cabinets, panels and walls, etc. Excellent Quality- Made of weatherproof ABS material, the surface is smooth and durable.