Ray Ban Sunglasses. Series number: RB4171. Color code: 710/T5. Size: 54. Lens Width: 54 mm. Lens Bridge: 18 mm. Arm Length: 145 mm. Polarized. Frame Material: Nylon. Frame Color: Tortoise, Gunmetal. Lenses Type: Polarized Brown Gradient. UPC/EAN code: 8053672495744. Ray-Ban Erika Classic Polarized Brown Gradient Sunglasses RB4171710/T554.