EBC Premium brake discs for one axle We offer the premium brake discs as OE spare parts. In the OE spare parts area, too, we attach great importance to manufacturing high-quality products in order to guarantee your safety. All EBC Premium brake discs are made of gray cast iron and have a tensile strength of 150N / m2 with a deviation in surface hardness of max. The premium brake discs are CNC milled with a surface tolerance of 0.01mm. So it is not a cheap import product, but a high quality OE spare part, which is in no way inferior to the quality of the originally installed brake discs.