New with case Unisex Ray Ban black sunglasses

Ray-Ban sunglasses model number RB4178 601/71 52□21 140 3N is the RB4178 black with green lenses. (601/71 for black frame with green lenses), the lens width (52mm), bridge width (21mm), temple length (140mm), and a general lens category (3N for dark, non-polarized lenses). Here's a breakdown of the model number: RB4178: The model number for these specific Ray-Ban sunglasses. 601/71: This is the color code, signifying a black frame (601) and green lenses (71), also known as G-15 lenses. 52□21: These are the lens and bridge measurements in millimeters; 52mm for the lens width and 21mm for the bridge width. 140: This is the temple (arm) length in millimeters. New without tag