... 4) CE/GS/SGS/ISO9001 bar nose(guide bar nose;steel bar nose) 1) ParameterDESCRIPTIONGB bar nosePART NUMBERGB375PITCH TOOTH COUNT3/8 ... 2) We are the first factory of manufacturing guide bar, saw chain, and sprocket in China. The ... product line includes guide bar, saw chain, sprocket, rim, wrench, chain breaker, ... the CE, GS, SGS, ISO9001 conformity certifications. GB bar nose