Custom Polarized Clip on Sunglasses For Ray-Ban CLUBMASTER RB3016 (RX3016) 51x21 (Black) Handcrafted workmanship on clip on lenses, virtually unbreakable Plastic Clip mechanism. 100%UV and full polarized protection from harmful sunlight. Convenient one hand application to Prescription frames with positive indexing lens position. Scratch and Impact Resistance. Ultra light weight. Size Dimensions (mm): Lens Length 51:, Bridge Length:21.