Description: This high technology optical glass door viewer provides a 200 degree wider angle and super clear view out of the door. A good home security system help to effectively avoid home invasion or unexpected visitor. Replace the old one to reduce the potential danger of yourself and your families, especially child and the elder.   Features: - Made of high quality copper material with plating process, corrosion resistant, more solid and durable. - Adopts high technology optical glass lenses to ensure clearer view. - 200 degree wider angle than the conventional door viewer. - With a lid to cover the lenses by manually rotating the lid and well protect your home privacy. - Easy to install, different color for you to choose.   Specifications: - Condition: 100% Brand New - Material: Copper + Optical LENS - Color: CP - Tube Diameter: 14mm - Fit for thickness of door: 50-75mm - Diameter: 16~19mm / 0.63~0.75inch - Angle: 180°   Package Included: - 1 x Door Viewer   How to Measure: Please take part the old door viewer at first and measure the size of hole; if there is no door viewer, please measure the thickness of door.   How to Install: 1. Depart the door viewer into 2 parts. 2. Insert the lenses from the outside of door. 3. Insert the base from the inside. 4. Tighten slot by hands or with the help of screwdriver.   Product sampling One of the biggest worries when purchasing from a new supplier, especially for the first time,here youdo could make sure all goods are what you want via taking the following measures.providing the pre-product samples for confirmation. •Mass production starts only after your approval •Send you one full set of samples before loading •Send you one full set of samples before loading