Ray-Ban RB4147 - BROWN PIPE GRAD.ON BROWN Frame CRYSTAL BROWN GRADIENT Lenses 56mm Non-Polarized Resin/Plastic Frame. Glass lens Non-Polarized 100% UV protection coating Bridge: 15 millimeters Arm: 145 millimeters Flat-top boyfriend-inspired sunglasses with non-polarized lenses and logoed temples Glasses might not sit completely flat. Slight adjustments to the shape and curvature of the sunglasses arms may be needed to get a custom fit. Adjustments should be made by a professional. Ray-Ban products include an etched "RB" on the left lens. The RB is not a scratch or defect.