Dita Grandmaster Nine Optical Frame pairs thick Japanese acetate with bold industrial hardware for a compact, robust square silhouette. Designed for everyday wear, it updates a late‑1970s b‑boy aesthetic with precise craftsmanship. Key attributes: Black | Negro | Titanium/Acetate | CR-39 lens material | Anti-reflective coating | Custom oversized titanium 3-barrel hinge | Proprietary titanium hex screws | Includes microfiber cleaning cloth and soft case | Thick acetate frame | Bold industrial hardware detailing | Compact square silhouette inspired by late-1970s b-boy style | Dimensions & fit: Lens width (Calibre): 54 mm | Bridge: 20 mm | Temple length: 145 mm | Frame width: 146 mm | Frame height: 50.1 mm | Compact fit | Robust construction | Composition & care: Acetate (frame) | Titanium (hinge hardware) | CR-39 (lens) | Clean lenses with the included microfiber cloth; store in the supplied soft case or box; avoid contact with harsh chemicals.