Copter™Screenprotector Made of a unique material of the highest wear resistance. The material was initially developed as a part of a military project in order to protect the rotor blades of helicopters and has now been adapted to protect your portable electronic appliances. With this pre-cut and size adjusted film you obtain not only the worlds strongest screenprotector but also a layer of protection that neither alters nor destroys the appearance of your appliance. The material is of such high quality that it comes with a lifetime warranty. If, for some reason, it no longer provides the intended protection, you will therefore receive a replacement free of charge. Specifications: Substrate thickness: 0.178 mm Adhesion to steel: 0.438 N/mm Tensile strength: 10.508 N/mm Elongation: 500% Operating temperature: -51°C to 149°C Application temperature: 10°C to 49°C