Door Viewer 1)Material:Zinc 2)Tube Dia:14mm, Length:35-60mm 3)Glass lens, 200 lens degree 4)Finish:SC,SN,AB,AC,GP Door Viewer1)Material:Zinc2)Tube Diameter:14mm, Suitable door thickness:35-60mm3)Glass lens, 200 lens degree, without back cover4)Finish:SC,SN,AB,AC,GP Door viewer