UL Fire Rated Door Viewer 180 Degree Wide Angle 5/8 Hole Satin Nickel

UL Fire Rated Door Viewer. Used to allow a user to identify visitors from the security of a locked door. UL Listed glass lens. Offers 180 degree wider angle lens for clearer viewing. Zinc die cast body. Requires an 5/8 inch hole and can be uses in doors that measure 1-3/8 to 2-1/16 inch thick. Exterior width is 1-3/16 inch. Interior width is 15/16 inch. Poly-bagged.