ROCK Ultra Slim Hard Cover Case for Nokia Lumia 920 (Blue) ROCK Ultra Slim Hard Cover Case for Nokia Lumia 920 With high quality polycarbonate materials,flexibility is admirable,not easy to break,not easy to be distorted Surface special baking finish,inside with flash silver powder,hard and steady,solid and exquisite Ultra-thin perfectly fit for your Nokia Lumia 920,hard material provide an excellent protection Fingerprint-proof,no sweat stains,easy to clean