1 Pcs Door Viewer, UL Listed Fire Proof Peephole, Solid Brass 180 Degree Spy Hole for Front and Apartment, Silvery Finish with Cover

{180° Wide‑Angle Lens} The precision‑ground glass lens provides an ultra‑wide 180° view, allowing you to see visitors from head to toe without standing close. Optical‑grade glass delivers a distortion‑free, clear image even in dim hallway lighting. {UL Certified} Certified to UL fire safety standards, this door viewer maintains structural integrity under high temperatures, preventing flames from penetrating through the peephole opening. Suitable for fire‑rated doors that must meet fire codes in apartments, hotels, and commercial buildings. {Quality Material} Made of solid brass, this door peephole resists corrosion, tarnish, and forced entry. {Adjustable Length} Fits door thicknesses from 35mm to 60mm — covering standard residential and commercial doors. The threaded barrel allows precise, gap‑free adjustment, ensuring a flush, wobble‑free installation on hollow metal, wood, or composite doors. {Privacy Cover} Equipped with a sliding peephole cover that blocks the lens from the outside when not in use. Simply slide the cover closed to prevent anyone from looking through the peephole — an essential privacy feature for hotels, dorms, and rental properties.