[GREY JACK GLASS LENS] - Glass lens provides clearer than plastic lens, is scratch resistant, and the multi-layer reflection coating not only reduces glare, it makes them easier to clean. [TWO SIZE OPTIONS] - MEDIUM SIZE: Lens Width:58MM, Lens height:47MM, Bridge width:14MM, Frame width:140MM, Leg length:140MM; LARGE SIZE:Lens Width:62MM, Lens height:50MM, Bridge width:14MM, Frame width:142MM, Leg length:138MM. [HINGE WITH DOUBLE SCREW] - The double screw hinge is more durable and opens and closes smoothly. [100% UV Protection] - 100% Protection Against Harmful UVA/UVB Rays. UVA and UVB Ultra Violet Blocking Lenses for Eliminating Glare While Maintaining Color Integrity. High-Definition Lens Gives You A Natural and Clear Vision; Durable and Shatterproof. [REST ASSURED TO BUY] - If any broken problem happening; just contact the seller without any hesitation to solve the problem until your satisfaction.