Product Description This door viewer is constructed of high-impact plastic and comes white in color. It features a large viewing screen of almost 2 inch in diameter and a reversed prism mirrored clear-image. The giant screen door viewer can be installed on doors ranging from 1-3/8 inch to 2 inch thick. Performance note: with sufficient outdoor lighting, this viewer provides only arm’s length viewing. Installation note: for best results when using viewer at night, ensure there is ample lighting illuminating the immediate area where viewer is to be installed. Use less lighting inside than that which is illuminating the exterior side of the entry door. From the Manufacturer This door viewer is constructed of high-impact plastic and comes white in color. It features a large viewing screen of almost 2 in. in diameter and a reversed prism mirrored clear-image. This giant screen door viewer can be installed on doors ranging from 1-3/8 in. to 2 in. thick. *Performance Note: With sufficient outdoor lighting, this viewer provides only arm’s length viewing. *Installation Note: For best results when using viewer at night, ensure there is ample lighting illuminating the immediate area where viewer is to be installed. Use less lighting inside than that which is illuminating the exterior side of the entry door.