PThink 0.3mm Ultra-thin Tempered Glass Screen Protector for iPhone 4/4S with 9H Hardness/Anti-scratch/Fingerprint resistant (iPhone 4/4S) Anti-scratch: 9H greatly intensified surface hardness which is 3 times stronger than regular PET film. 0.3mm Ultra-thin, specially 2.5D rounded edges for safety and a more precise fit. Tempered glass film provides super smooth touching as well as no lose in touch screen sensitivity. Coming with a cleaning kit helping you wipe away marks and fingerprints during the easy installation, remember not to fold the tempered glass film when installing. Make your screen Perfect Shatterproof: when great impact comes and the glass protector gets broken, it cracks into small pieces that are held within the film, they are not sharp, the glass film absorbs the impact so as to protect the phone screen from shattered.