Product Name : Door Viewer;Color : Silver Tone Material : Metal; Viewing Angle : 180 Degree Mounting Hole Dimaeter : 14mm Fit Door Thickness : 15-25mm Weight : 31g 200 degree viewing angle, metal housing, easy installation. Desinged with adjustable threaded tube, is convenient to install for 50-75mm thickness door. Packkage : 1 x Door Viewer Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.   Quality Control We have a strict standard on raw materials and will proceed more than 6 times inspection during the mass production, including the artificial selective examination and machine upon request if necessary.