... /SN/PB material:zinc alloy package:color box Wide angle 160 degree zinc alloy door viewerDoor viewer is ideal for identifying ... 55mm thickmaterial: brass, zinc alloy, stainless steellens: glass or resinangel: 160 degree, 180degree, 200 degreefinish: PB. AB.AC.CP. SNwith cover ... or without coverTube Dia.: 12mm & Outside Dia.: 16mm 160 degree zinc alloy door viewer