5551 Thintanium Eyeglasses by Lindberg. Color: 05, 10, 20, 30, 60, 70, 75, 77, 80, 85, 90, 107, 113, 117, GT, U12, U13, U14, U15, Size: 55-17-140, Temple: Classic. The 5551 by LINDBERG is a masterclass in minimal sophistication: a rimless-bottom design with a refined titanium upper bar. The temples and nose pads are subtly integrated for a streamlined appearance. The frame hovers lightly, letting your features stand front and center. Designed for those who crave elegance in discreet form.