Feature: Quick installation: easy to install, the door viewer can be replaced within 5 minutes without tools. Protection function: The lens can protect your house from theft, invasion and house invasion. Large viewing angle: The 220-degree viewing angle ensures the safety of identifying visitors from behind the locked door. You can easily view the entire surrounding area. Applicable door thickness: 35mm-55mm, suitable for wood, fiberglass or metal doors. Privacy protection: After the lid is closed, outside visitors will not see the audience entering your house, thus providing you with the highest level of privacy protection and security! 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. ​Quick installation: easy to install, the door viewer can be replaced within 5 minutes without tools. Protection function: The lens can protect your house from theft, invasion and house invasion. Large viewing angle: The 220-degree viewing angle ensures the safety of identifying visitors from behind the locked door. You can easily view the entire surrounding area. Applicable door thickness: 35mm-55mm, suitable for wood, fiberglass or metal doors. Privacy protection: After the lid is closed, outside visitors will not see the audience entering your house, thus providing you with the highest level of privacy protection and security!