Carbon brushes wear and may need to be replaced. This is where you get original Kress (AMB) carbon brushes.
Fits 1050 FME-1, 1050 FME , 800 FME, 800 FME-Q, 1050 FME-1 DI, and 800 FME-Q DI.
One package includes two brushes which is necessary for operation.
Note: the image does not show the exact product.