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 zinc alloy, 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 Materia l: Zinc Alloy Color: Brushed Silver, Red Bronze, Bronze, Gold(Optional) Tube Diameter: 16mm / 0.63inch Fit for thickness of door: approx. 35~65mm / 1.4~2.6inch Hole Diameter: approx. 16~19mm / 0.6~0.7inch Angle: 200° Weight: approx. 37~45g 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. Note: 1. Please allow 0-2cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. .