MyBat ZTE Z970 (ZMAX) Tempered Glass Screen Protector II) Advanced - Retail Packaging - Clear The Tempered Glass is 0.4mm thick and made with chemically treated transparent tempered glass. Can provide break protection and shock resistance. The surface of The Tempered Glass has a hardness of 8-9H three times stronger than regular PET film. Even sharp objects such as knives and keys will not scratch this product. The Tempered Glass has an oleophobic coating that prevents fingerprints and other contaminants and makes the film easy to clean.