Montblanc MB0438O Optical Frame from the Nib collection pairs a squared silhouette with the brand's signature nib metal icon on the endpieces. The full-acetate construction and gradient brown-to-beige finish make it a refined choice for everyday prescription or non-prescription wear. Key attributes: Brown | Marrone | Acetate | Demo lenses fitted | Prescription-ready | Includes Montblanc case | Square frame | Nib metal icon on endpieces | Full-rim acetate construction | Gradient brown-to-beige finish | Dimensions & fit: Lens width: 53 mm | Lens height: 42 mm | Bridge width: 17 mm | Temple length: 145 mm | Composition & care: Acetate