... with heat-treatedfactory can do all kinds of motorcycle chain, such as 415,415h,420,420h,428,428h, ... bigger and stronger one, so we just supply good quality chain but reasonable pricebrand can be OEM or use ... our own brand OS . colour of chain is up to customerall the material is 40Mn for ... chain factory, we want to be more and more bigger and stronger one, so we just supply good quality chain ...