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TTR9019 Men style; Ultra-thin stainless steel with BIO-TR rim on the front ,very strong toughness
Men style ,material: Ultra-thin stainless steel with BIO-TR rim on the front ,very strong toughness(refer the photo as right side),suitable for the lens power within -3.50,the screws on the temples can open ,easy to operate once change the lens . Total weight is light ,similar as Titanium .Normally Titanium have 8g ,this model 10g.