Montblanc MB0452O Optical Frame pairs a classic rectangular silhouette with Montblanc craftsmanship. Designed for everyday prescription use, it delivers a polished, professional look. Key attributes: Black | Acetate | Prescription-ready | Progressive lens compatible | Includes demo lenses | Includes case and cleaning cloth | Full-rim rectangular frame | Shiny black finish | Dimensions & fit: Lens width: 55 mm | Lens height: 41 mm | Bridge: 17 mm | Temple length: 150 mm | Composition & care: Acetate | Clean lenses with a microfiber cloth and mild lens cleaner. Store in the supplied case. Avoid heat and solvents.