FUSE Lenses for Ray-Ban (B&L) W2575 Photochromic (Light to Dark) plastic frame interchangeable lens Non-polarized lenses Lens width: 52 millimeters Lens height: 32 millimeters Fuse Photochromic Lenses. Starts out light grey and darkens in sunlight. Non-polarized lenses Completely block harmful UV rays, providing 100% UVA/UVB protection Fuse Force scratch resistant hard coating Light Transmission Indoor 48% to Outdoor 16% Custom Made to easily interchange with your current sunglasses