Premium 9H Tempered Glass Screen Protector Ultra Shield for Apple Iphone 4 4s with Oleophobic Coating (Black) up to 99% clarity: 100% High Quality Extra Sensitive touch screen and 0.4mm thick tempered glass 9H Surface hardness / 3 x Stronger than regular PET Film Anti-fingerprint, grease, dirt & shatterproof glass Never any air bubbles and Easy Installation. See http://www.youtube.com/watch?v=KJKMlEDKu5M for Installation directions