Montblanc MB0431O Optical Frame combines a refined metal construction with a clean rectangular profile for everyday prescription wear. The design emphasizes lightness and a polished silver finish for a sharp, professional look. Key attributes: Gray | Silver | Transparent | Metal | Lightweight | Corrosion-resistant | Durable | Compatible with prescription lenses | Rectangular shape | Thin metal frame | Subtle logo detail at temples | Dimensions & fit: Lens width: 53 mm | Bridge: 19 mm | Temple length: 145 mm | Size M (medium) | Composition & care: Metal frame | Plastic lenses | Clean lenses with a microfiber cloth and lens cleaner; store in a protective case.