Flexon EINSTEIN 600 Eyeglasses 033 Gunmetal 54mm offers real-world value. Key details you’ll like: Flexon EINSTEIN 600 Eyeglasses 033 Gunmetal 54mm Learn more here: Flexon EINSTEIN 600 Eyeglasses 033 Gunmetal 54mm. To get 10% discount use the coupon code VSC10.