Guess Eyeglasses. Series number: GU9180. Color code: 091. Color: Demo Lens. Shape: Square. Lens Width: 49 mm. Lens Bridge: 17 mm. Arm Length: 130 mm. Frame Material: Metal. Frame Color: Blue. Lenses Type: Demo. Rim Style: Full-Rim. UPC/EAN code: 664689952502. Guess Demo Square Mens Eyeglasses GU9180 091 49.