Product Description This door viewer is constructed from solid brass and comes plated in satin nickel. It features solid brass end caps with plastic and UL listed glass lenses. It provides 200 degrees of viewing and fits on 1-3/8 to 2-1/8 in. thick wood or metal doors. From the Manufacturer This door viewer is constructed from solid brass and comes plated in satin nickel. It features solid brass end caps with plastic and UL listed glass lenses. It provides 200 degrees of viewing and fits on 1-3/8 to 2-1/8 in. thick wood or metal doors.