For Polar M200 Tempered Glass Screen Protectors 0.3mm Arc Edge Scratch Resistant Watch Film This protective film is made from chemically processed real glass, with high transparency and a delicate touch feeling. The tempered glass has an oleophobic coating to prevent contaminants. With a secure anti-explosion function, it will not be broken into small pieces of sharp. Made from chemically processed real glass High transparency and delicate touch feeling Secure anti-explosion function 0.3mm thickness but strong hardness Smooth arc edge, safe to use