The New Electric Eyewear Hardknox (Matte Black/M Grey) Plastic Frame Sport Sunglasses, unisex, Eyewear , Sport , Plastic Frame, One Size, true, Freshen up any mug with the clean lines and bold style of the Hardknox from Electric Eyewear. A classic silhouette is redefined with an eye for Electric style. Six based handmade acetate with injected wire core for long lasting durable wear. Six base CRX lens offers 100% UVA and UVB protection. Three barrel stainless steel optical hinges. Electric logo at temples. Dimensions: Lens: 54mm wide x 36mm high Bridge: 15mm Frame Width: 144mm