... founder, director, and quality control are all from Gear Factory of State-owned Heavy Industry, relevant work ... 80 million pcs of gears & shafts.C. Mainly supply for: Sino truck, Steyr, Cummins, Mercedes Benz, Kassbohrer, Kinglong, Yutong ... .D.ModulusLengthPrecisionCylindrical gear8001-10Din6/ISO6/GB6Straight/Helical/bevel gearShaft gear4001-10350Din6/ISO6/GB6Ring gear4001-10 Driven gear for HOWO truck