The door peephole material is zinc alloy + high-definition optical glass, sturdy and durable, which can protect your privacy wellThe size of the silver door peephole is 30x25x16mm, the diameter is 16mm, and the adjusted length is 55mm. It is suitable for doors with a thickness of 40mm to 55mm. It can be used for wooden doors, iron doors, etc. Door peephole features a high definition lens with a wide angle of 200 , which allows you to clearly see things outside the door through the high definition peephole inside. When you put the cover on, people outside can not see the room, which is very effective The role of good privacy Door peephole installation steps: 1. Drill an appropriate size hole; 2. Unscrew the door peephole; 3. Insert and tighten the front end of the door peephole on the outside of the door; 4. Put the rear end of the door peephole on the door Insert and tighten Package include: 4 pcs of silver door peephole Product Description Features 1. High definition, sturdy and durable 2. Suitable for door thickness 40mm-55mm 3. Widely used in families, apartments, hotels, etc. Specifications 1. Material: zinc alloy + high definition optical glass 2. Color: silver 3. Size: 30x25x16mm, diameter is 16mm, adjusted length is 55mm 4. Package includes: 4 pcs of peephole silver door Attention 1. Please pay attention to whether the size is suitable before purchasing