Specification: Condition: 100% Brand New Color: Sliver Material: Zinc alloy Suitable for opening: diameter 14mm Suitable for door thickness: 35mm-55mm Degree: 220 Package Included: 1 x Door Viewer Notice: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures. Ultra HD Lens: This peephole high-quality optical lens with a 220-degree viewing angle provides a crystal-clear field of view and extraordinary wide-angle coverage. You can easily see the entire surrounding area from the top of your head to the feet of someone standing outside. Increased Privacy: The threaded design resists vandalism, and the thickened cover is more sturdy and private, increasing your privacy. When the lid is closed, outside visitors cannot see your home through the viewer, used to allow users to identify visitors through the peephole of a locked door, Zinc Alloy: The door observer peephole is made of Zinc alloy, the material is strong and durable, the workmanship is fine, the size is suitable, and it can be installed on the door, which can greatly improve the privacy. Easy Installation: This peephole features a door viewer in durable solid brass metal, making it super easy to install. Simply drill a properly positioned 9/16" diameter hole, insert the viewer into the hole, then screw the two sides together and hand tighten. Once installed, you can see a lot of the area. Widely Used: Door peepholes are suitable for home, office, hotel and front door, when the doorbell rings before opening, you need to see, monitor, spy and peep people outside the door, giving you extra privacy protection. It is an essential accessory for security door monitors and door accessories.