SAFE AND THOUGHTFUL — With hollow Cat Door, Cats could come in and out freely and wouldn’t scratch your basement door, laundry room door, bed, etc. EXCELLENT QUALITY - – Cat door is made of non-toxic, odorless and durable ABS material and not easy to break for a long service life. Also, easy to clean and can use for a long time. EASY INSTALLATION — Cat flap with the appropriate size can be installed on doors or thick walls and can be cut according to the thickness of the door. APPLICATION — Interior Cat door is used for the cat to move freely in the front and back of the door, saving the owner the trouble of opening the door for her. Features— Kitten hole collar door also keeps dogs of the bedrooms, giving darlings a place to eat and a place to escape.