Feature: Suitable for door thickness: 35mm-55mm, suitable for wood, fiberglass or metal doors. Easy to install, replace your door viewer in 5 minutes with no tools required. The lens will secure your home against burglary, intrusions and home invasion. 220 degree viewing angle provides the security of identifying visitors from behind a locked door, You can easily view the entire surrounding area from the top of the head to the feet of someone standing outside. A solid, heavy duty viewer cover increases your privacy. With the cover in place, visitors outside cannot see through the viewer into your home, offering the highest level of privacy for your protection and safety! 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.