various carbon brush for different motor, such as the automobile, house applianse and so on

The specification of carbon brush for generator:

carbon brush (double)    2(15*30*40mm) 

Grade: Hg-74    Hardness: 14.7-49 KPA*10E4
Resistivity: 35-75 OHM MM2/M
Rated current density: 12A/cm2

Specific Brush pressure: 17.5-25KPA