CB303 carbon brush set For Makita 194996-6 191963-2. Compatible with Makita 9403, 5740NB, RP1101, LS0711Z, RD1101, RF1101, 4101RH, 9015B. Carbon brushes are easy-to-wear items of the motor, and need to be replaced regularly due to the friction between the electric drive and the carbon brushes in daily use. New carbon brushes keep the motor running and make you more productive.