Masunaga GMS-819 Optical Frame pairs titanium and acetate construction with a classic eyewear profile for reliable everyday prescription wear. It’s designed for comfort and easy lens replacement at an optician. Key attributes: Black | Titanium and acetate | 4-base curve lenses | Handmade in Japan | Clear demo lenses included | Compatible with prescription lenses | Titanium and acetate mixed construction | 4-base curve lens geometry | Dimensions & fit: Lens width: 46 mm | Bridge: 21 mm | Temple length: 145 mm | Lens height: 41 mm | Composition & care: Titanium | Acetate | Clean lenses with lukewarm water and mild soap, then dry with a microfiber cloth. Store in a protective case and avoid abrasive cleaners or solvents.