We can offer you all kinds of motorcycle rocker,rocker arm,engine part,OEM is welcome This part is manufactured with 20 Crmo materials.It is fully carbureted,making the deepness reach at 0.5-0.8 and the hardness for the surface reach at 58-62HRC after heat treatment while the hardness for the depth reach at 38-45HRC. Certification:QS-9000:1998 ISO 9001:2000 Feature: 1)National standard,quality guarantee,long lasting working life time 2)Competitive price 3)Positive customer feedback from oversea and domestic market. 4)Sample purpose order is accepted