Carbon brush sets for self starters, packed in clear printed pouches; labelled packs read "SELF BRUSH" with quantity "1 SET". Each brush is a rectangular carbon block with a braided copper lead, and some leads are sleeved in black insulation. Labels give part number, application, quantity and packing date, with part numbers including 3933-1767 and 39337359. The brushes carry current to the starter motor's commutator.