About this item: [ Easy access for small pets] Pet screen door can make your and cats go in or out freely enough without for your help to open the door, great for your pet potty break or playtime. Upgrade doggy door made of high temperature resistant PP material. The door is not easily damaged by prolonged exposure to the sun. Reinforced door hinge parts can better withstand dog swinging in and out during use. Only use on screen door, window or other screened areas. installtion, prepare cutter knife and screwdriver to install this dog door for screen door. Use a flat-head screwdriver to separate the door so you have 6 parts, 2 of door frames, flaps and locks. Inner door flap didn't come with a screen insert, need to put this on a screen you already own, then cut down the screen against the frame and place it inside the flap. need to be installed base on the pet's height, fit most breed cats and small . Product Name: Pet Screen Window Doors Product application: small & cats outside frame size: 25cmW x 31.5cmH 25cmW x 31.5cmH for small , cats, rabbits, or other small pets less than 30lb to go in and out freely Color: Black Material: ABS Package Contents: 1 x Screen Door Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.