Features: 100 percent Brand new & High high quality It gives a further security and convenience for you and your family Installation is straightforward and convenient, users can set up it by way of themselves Fit any door whose thickness is 45-75 mm or 75-105mm Package Content: 1 X Metal Cat Eye with lid Tips: Dimension dimension method: deserve to measure the diameter of the outlet on the door, the scale of the door (door depth) Do now not measure the size of the outdated cat's eye. If the cat's eyes are still on the door, eliminate it first. If the original door isn't yet open, measure the thickness of the door.