Yantai HuiLi Auto Parts Co., Ltd. "HuiLi Brakes" produce the largest range of brake drum and brake discs in the world. With over 3000 part numbers for every type of moving vehicle. The brake discs or brake rotors are made in the china. Our product range includes brake discs or brake rotors for cars, trucks and SUV, brake rotors (brake discs) for every rolling vehicle on the planet. Properties desired for brake rotors and drums Design was follow OE specifications (dimensions and configuration). Rotor was have a smooth non-directional surface finish Rotors and drums was have engraved on them this information; brand , part number , minimum thickness, date of manufacturing (YYMMDD) and Made in PRC. Brake rotors and drums was made of Gray cast iron SAE Grade G9 (old G2500) or G10 (old G3000) according to SAE J431 and should comply with these specifications;