Window lens like cell phone, MP3,MP4,DVD,etc. Principal material: PMMA, PC, etc. Principal characteristics: Ray transparency: PMMA more than 91% PC more than 85% Obscurity: more than 1.0% Sealing rate: 100/100 Water density: 100/100 Pencil hardness: more than 5H give me your requirements,we can produce under your specification.