Montblanc MB0338O Optical Frame is a square acetate design from Montblanc’s Nib collection, built for everyday prescription wear with a thin, easy-to-wear profile and recognizable nib detailing on the temples. Key attributes: Black | Acetate | Thin, lightweight profile | Durable acetate construction | Compatible with prescription lenses | Supplied with original Montblanc case | Square frame | Full-rim acetate frame | Nib detail on temples | Montblanc logo on temples | Dimensions & fit: 52-18-145 mm (Lens width - Bridge - Temple) | 54-18-145 mm (Lens width - Bridge - Temple) | Thin profile | Square frame shape | Composition & care: Acetate