... ,10,11,12 2.decription:WS,ST,OR,DLD,SV 3.Brand:Longer guide bar nose:WS bar nose,ST bar nose,OR bar nose,DLD bar ... nose,SV bar nose,GB bar nose(GB375),harvester bar noseHangzhou Longer ... from America, which shares the same origin of materials with OREGON. And the type of the materials is SAE8660. Heat treatment ...