Montblanc MB0366O Optical Frame pairs a refined square silhouette with a distinctive metal nib detail on the temples. Designed for everyday prescription wear, it offers lightweight acetate construction and a polished, professional look. Key attributes: Black | Acetate | Lightweight construction | Full-rim frame | Prescription lens compatible | Includes original Montblanc case | Square / geometric shape | Metal nib detail on temples | Montblanc lettering logo on right temple | Dimensions & fit: Lens width: 51 mm | Lens height: 43 mm | Bridge width: 18 mm | Temple/arm length: 145 mm | | Composition & care: Acetate | Clean lenses with a microfiber cloth and lens cleaner. Store in protective case when not in use. Avoid exposure to extreme heat.