Door Viewer Viewing Angle: 180 Degree Mounting Hole Diameter: 16mm / 0.63'' Fit Door Thickness: 35-60mm / 1.4''-2.4'' * Designed with adjustable threaded tube, ideal for 35-55mm thickness doors, easy to install. * Color: CP * Material: BRASS * Weight: 24g * Package: 1 x Door Viewer Manufacture We are strictly control quality from raw material to finished products. And ensure high quality of your required product, we strictly inspect and test the products before shipment.