Technical components - inexpensive alternative spare parts 2 pieces of carbon brushes, motor carbons, grinding carbons, carbon pencils (new) - Tested ULFATEC brand quality - Compatible for BOSCH: GCM 8 p GCM10 GCM 10 SD GCM12 GCM 12 SD replaces 1.609.203.J13 + 1.609.203.L83 MDimensions of coals: 7 mm (width) x 17 mm (thickness) x 17 mm (length) Please compare the information on the nameplate of your machine with the names in the item description. All company and brand names and trademarks indicated are the property of their owners and are used solely to identify and describe the products .