Serengeti Hurikanu Drivers Sunglasses (Sport Classic) Bridge: 17 millimeters Serengeti lenses block virtually 100% of UVA and UVB rays, exceeding all government and commercial standards. Our lenses also feature an anti-reflective coating on the backside of the lens to block glare and reflections. Lens size: 56x 37.5 x 56.5mm, DBL 17mm Temple Length: 125mm/ Spring Hinges