... :35-60mm Diameter:22mm Lens cover:with stainless steel door viewer door scopeItem No.:SVA-37-22Material:high quality stainless steel ... 304Finish:polished satinAvailable for wooden door,including apartment,hotel room,firm,office,etcDoor thickness:35-60mmDiameter ... products convince you,please contact us. About us... stainless steel door viewer door scope