Feature: 1.Available to fit doors between 35mm and 60mm in thickness. 2.180degree wide viewing angle. 3.Made of solid and thickened material, sturdy construction. 4.With a rear cover.Specification: Product Name: Peephole Model: ZB-05 AC Color: AC Material: Zinc alloy Hole inner Diameter: 14mm Telescopic length: 35-50mm Angle: 200 degree Surface treatment: Plating Package included: 1 x Door Peephole