Montblanc MB0291O Optical Frame combines a classic round silhouette with a sturdy acetate construction for everyday wear. Designed for prescription compatibility, it pairs timeless style with practical functionality. Key attributes: Black | Acetate | Prescription lens compatible | Includes original Montblanc case | Prescription lenses can be fitted | Round frame | Full-rim design | Dimensions & fit: Lens width: 50 mm | Bridge width: 20 mm | Temple length: 150 mm | Lens height: 44 mm | Composition & care: Wipe clean with a soft, dry cloth. Store in the supplied case. Avoid exposure to extreme heat and harsh chemicals.