Retina and HD SuperAMOLED compatible high quality screen protector for your device's screen The surface of the tempered glass has a hardness of 8-9 H and thickness is 0.33 mm, three times stronger than a regular screen protector film. Even objects such as knives and keys will not scratch tempered glass Ultra clear for 98% transparency: Light Penetration Ratio 93.7% as compared with usual protective film 80% Bubble Free., Toughened glass has high transparency, and the color never changes. The surrounding part is smooth to protect the screen from being smashed, The product is environmentally friendly. Coating of oleophobicity: anti-fingerprint, anti-oil, anti-acid and anti-alkali, Ultra-thin glass (T=0.33mm) can be treated by toughening under high temperature of 420, Thickness of stress layer: 12um; thickness of surface: 8-9H, High safety coefficient ( pasted with bursting disk to prevent glass crack and cullet dropping), Advanced fitting technology of anti-static silica membrane, to make convenience for the fitting and dismantling,