... zinc alloy Color:CP, Gold plated, Satin nickel etc. Viewe angle:200 degree Door thickness:40-70mm Door viewer Product details: Name:Door ... Many types available9. Many surface available10. Cover for door viewer available11. Passed ISO9001:2008 About Gerbon:Gerbon ... s comprehensive hardware technology supply solutions include: hydraulic hinge, standard hinge, soft close slide, standard slide, handle, ...