Model code: RB8301 004/51 59-14 Frame material: Carbon Fibre Frame color: Gunmetal; Grey Lenses: Light Brown Gradient Ray-Ban ® Tech RB8301 sunglasses are all about innovation and use of new materials. This Ray-Ban Tech segment highlights the use of carbon fiber. Carbon fiber and a resin composite creates a lightweight, strong, flexible, and resilient material. The Ray-Ban monel Aviator™ inspired sunglasses have a smaller rounded eye shape and is paired with slim elongated carbon fiber temples. Rubber temple tips for added comfort and non-slip grip. THESE ARE SELLING FOR $211 very good condition - tiny marks on lenses that are barely shown in photos and are not noticeable when on.