Oakley Backwind 0.5 OX3163-0352 Satin Black Clear Demo 52 Metal frame plastic lens non-polarized Lens width: 52 millimeters Bridge: 19 millimeters Arm: 139 millimeters 5" Frame Width 1.25" Lens Height Authentic Oakley Optical Eyewear Includes Original Oakley Hard Case Constructed of ultra light weight, C-5 metal material