Plastic Door Viewer, Door scope, Peephole, Eye viewerhousing material: plasticlens:glassangel:120 degree diameter:38 mm or 44mmdoor thickness: less than 50mm Specifications: 1) Three alternative specifications (3840, 3850 and 4450): 38mm and 44mmis the diameter of hole in the door for door viewer;40mm and 50mm means the thickness of the door or less than 50mm 2) 3840 and 3850 both adopt Φ38 mm door aperture, viewer diameter: 3840 (40mm), 3850 (44mm); 4450 adopts Φ44 mm door aperture 3) Dimensions (LxWxH) (mm):80*70*70mm GW/NW: 130g/120g Characteristics: a) Optical systems adopt complete optical lens and you can get clear and stable image b) Visual angle may reach 120° for easy observation c) It adopts fireproof engineering plastics so it is safe and reliable d)Special installation structure can effectively prevent the outside demolition of door viewer Colors: There are four colors for your choice: black, white, golden, and silver For more details, you are welcome tocontact us by sending inquirydirectly! Our favorable price with good quality will be ready for you at any time, friend! GOOD QUALITY---FAVORABLE PRICE---TIMELY DELIVERY!!!