Ermenegildo Zegna Eyeglasses. Series number: EZ5131. Color code: 008. Color: Demo Lens. Shape: Round. Lens Width: 51 mm. Lens Bridge: 22 mm. Arm Length: 145 mm. Frame Material: Metal. Frame Color: Grey. Lenses Type: Demo. Rim Style: Semi-Rimless. UPC/EAN code: 664689941704. Ermenegildo Zegna Demo Round Mens Eyeglasses EZ5131 008 51.