... :40Mn with heat-treatedfactory can do all kinds of motorcycle chain, such as 415,415h,420,420h,428,428h ... the plates with standard thickness .as middle-scale roller chain factory, we want to be more and more ... OEM or use our own brand OS . colour of chain is up to customerall the material is 40Mn for ... the plates with standard thickness .as middle-scale roller chain factory, we want to be more and more ...