... /GS/SGS/ISO9001 1/We manufacture guide bar,saw chain, sprocket,rim,wrench,chain breaker,rivet spinner,sawfile and so on.2 ... of bars include laser-welded stellite bars as well as sprocket nose guide bars,carving bar,pro solid bar,harvester bar ... oregon's from USA directly.5/sporkcet including drive sprockets, rim sprocket. there are hundreds of models which can compare with OREGON ...