Package Includes: 8 Pack CB303 Carbon Brush Replacement Set.  Replaces part numbers: 191963-2 194996-6.  Compatible: ( not limited to the following models) Compatible with 9227C, 9403, 9404, RD1101, DA4031, 5740NB, 4101RH, LS0711Z, LS0714, 9015B, 9016B, JR3030, JR3070CT, JR3050T, UB1101, GV7000C, GA5011, SP6000K, SP6000, 2107F, 2107FK, 9921, 9903, 9902, 4131.  Quality Material: Imported high quality carbon for long lasting. Worn brushes frequently are the cause behind a motor running poorly. Replacing brushes can fix a motor that's operating intermittently. New brushes can restore a motor's electric braking.