Montblanc MB0251O Optical Frame pairs an acetate front with carbon-fiber–reinforced temples for a refined, comfortable everyday frame. Key attributes: Black | Transparent | Acetate | Carbon-fiber reinforced temples | Durable acetate front | Spring hinge | Adjustable rubberized temple tips | Compatible with prescription lenses | Rectangular full-rim shape | Snowcap emblem on temples | Acetate front with carbon-fiber overlay | Dimensions & fit: Lens width: 54 mm | Bridge: 18 mm | Temple length: 145 mm | International fit | Composition & care: Acetate (front) | Rubber (temples and end tips) | Carbon fiber (temple layer)