This screen guard is 0.33 mm thick made with chemically heated transparent glass. With a surface hardness of 9h, it can effectively protect your screen from scratches and external shocks. Its oleophobic coating prevents fingerprints and other stains making it easier to clean. The self-adhesive silicone can touch on the screen smoothly, makes the installation easy, sensitive for operation. If broken the tempered glass breaks into small pieces that are not sharp making it safer for the user.