FitSand (TM) 2PCS High Definition Scratchproof Screen Protector Film for HP Prime Graphing Calculator Perfect silicon, no bubble, fast adsorption Wear resisting and anti scratch, up to 3h hardness Excellent silicone coating tech-no glue trace, no residual Hight transparency stuff, screen sharpened display, pellucidity more than 98% Package Includes: 2 x Screen Protector Films