Barbecue Supply is an essential item for any outdoor grilling event. The two main components of a barbecue supply are BUNS and coals. BUNS, with four letters, are the bread-like product that is used to make hamburgers and hot dogs. Coals, with five letters, are the fuel source that is used to heat the grill and cook the food. Together, these two items make up the necessary supplies for a successful barbecue.