4 types of closure: cat door t have 4 closure options: open inwards. open to the outside. in both directions open. closed. You wont open the door if your pet wants to enter the space. The cat door makes life easier and your pet free at home. Easy installation - cat door is suitable for brick walls. with wooden doors. to PVC and metal doors and can be installed on doors and walls with a thickness of 2 to 5 cm. The cathouse is made of durable ABS plastic. weather resistant and easy to clean. Welcome door size - L-Frame size: 23.5 x 25 cm (width x height). Door size: 18 x 19.5 cm (width x height) Thickness: 5.5 cm. Very quiet: this door is extremely quiet and offers optimal protection against drafts with a special seal and magnetic closure. The brush bar eliminates noise when opening and closing the door. Fits most cats and small dogs (Pomrania. Yorkshire Terrier. Beijingers. Dakkel. etc.). Adopt a transparent visual design: The transparent cover is made of high strength fiberglass. which protects against UV rays. good transparency. protects against moisture and abrasion.