1.long use life 2.best price 3.good material 44.certified by iso9001:2008 1).supply carbon brush substitute for various kinds of automobile starters and alternator brand like Bosch, Delco-Remy, Denso, Ford, Lucas, Mitsubishi and other Japanese car.2)Small spark,low noise 3)Anti-electrical interference 4)long use life,safe and so on... Automobile carbon brush