Ray Ban Sunglasses. Series Erika. Color code: 601/8G. Size: 53. Shape: Round. Lens Width: 53 mm. Lens Bridge: 18 mm. Arm Length: 145 mm. 100% UV protection. Non-Polarized. Frame Material: Nylon. Frame Color: Black. Lenses Type: Grey Gradient. UPC/EAN code: 8053672673722. Ray Ban Erika Grey Gradient Nylon Sunglasses.