The 999.9 AP-31.90 reworks a Boston-style frame in black translucent acetate, finished with metal riveting and an original flexible AP temple. A Spring B titanium mechanism and adjustable metal nose pad deliver considered comfort, while the frame arrives set with a demo lens. 999.9 AP-31.01 Boston-style frame Translucent acetate frame Metal riveting Original and flexible AP temple Spring B titanium mechanism Adjustable metal nose pad Set with demo lens Comes with Color: Black Material: Titanium, Titanium Alloys, Cellulose Acetate See more Optical Glasses , Eyewear and Accessories Vendor Code: 9999.AP-31.90 Approximate dimensions: Frame Height: 4.5cm Frame Width: 13.5cm 47 ☐ 23 - 144