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Door Thickness
Defender Security - Door Viewers
Color = Bronze
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U 9916 - Door viewer
High-impact plastic housing requires a 1-3/4" hole. "Clear image" prism construction allows arms length viewing with nearly 2" of giant screen viewing. Fits 1-3/8" to 2" thick wood or metal doors. Prism image is a reversed and mirrored image.

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.