Sino Perfect Premium Tempered Glass Screen Protector for Iphone 4s / Iphone 4 Premium Crystal Clear (0.3mm) 9h Hardness- Retail Packaging 30 days money back guarantee! Compatible with iPhone 4 / iPhone 4s. Ultra Strong: Real Glass with Scratch-Proof Hard Coated Surface [9H Hardness] resist sharp objects like knives and keys. Ultra Clear: Oleophobic Coating and Chemically treated with crystal clear transparency. Ultra Sensitive: Glass is only 0.3mm thick keeps 100% touch sensitviity. Ultra Easy: Super easy to install. No bubbles, No fuzz!