Montblanc MB0388O 001 Optical Frame is a full-acetate square eyeglass frame that pairs signature Nib-logo detailing with a comfortable, everyday design. Key attributes: Black | Acetate | Lightweight construction | Durable acetate build | Full-rim frame | Compatible with prescription lenses | Includes original Montblanc case | Square/rectangular shape | Nib logo on temples | Rounded temples with flat tips | Dimensions & fit: Lens width: 54 mm | Bridge: 18 mm | Temple length: 145 mm | Composition & care: Acetate