GREN Brake rotors and Drums are manufactured by Qingdao GREN Machinery Company (China). It provides OEM(Original Equipment Manufacturer) level brake products to most passenger vehicles, light and medium duty trucks manufactured by all European, US and Asian auto makers. Qingdao GREN Machinery Company is an QS9000, ISO9001, and VDA6.1+ certified manufacturer by TUV Rheinland company(Germany).

After decades in manufacturing, GREN products are now well known in domestic market and exported to all the major world market, including European, North American and Japan. GREN has a reputation of excellent quality, yet with great value. GREN will continue to strive for designing, manufacturing and carrying the best products in the world, while remain its competence in the world market.