Pure Copper 200 Degree Anti-Theft Peephole Door Viewer Home Security Wide Angle Door Spyphole Eyes Specifications: Package size: 5.7 X 3 X 3 cm/2.24 X 1.18 X 1.18 in Product weight: 43g Top: 30mm; Door diameter: 16mm; Applicable door thickness: 35-55mm/1.38-2.17in; Y: tail cover; P: optical lens; Degree: 200 deg Material: Pure copper Specification: Pure copper 16mm diameter dumb black Type: Universal door peephole Note: Please allow 1-3 cm differs due to manual measurement.