Flexon Nathaniel 600 Eyeglasses 210 Dark Brown 54mm brings real-world value. Here’s a closer look: Flexon Nathaniel 600 Eyeglasses 210 Dark Brown 54mm See photos and details: Flexon Nathaniel 600 Eyeglasses 210 Dark Brown 54mm. To get 10% discount use the coupon code VSC10.