Our door viewers are a great addition to add extra security to any entrance doors.Door viewer with glass lens which allows the user to see out for 180 degrees.Can be used on front doors which vary in thickness between 38mm-63mm.Our Black finish is a popular choice in traditional settings. Its subtle sheen offers a bold contrast on stained and painted timber alike. During the manufacturing process, our Black products are baked in a high-temperature oven, giving them durable, corrosion-resistant qualities.Lens Diameter: 9mmBarrel Thickness: 12mmHead Size: 16mmDoor Thickness: 38mm-63mm.