... Number:BEST-SW10042.Material:stainless steel3.Application: bicycle sprocket wheel4.Certification:ISO9001:20005.Packaging:wooden boxwe ... requirement. IntroductionWe can manufacture various kinds of bicycle sprocket wheel with different sizes by different processes ... steel , aluminum alloy , zinc alloy , brass , gray iron , nodular cast iron , ductile iron specified StandardASTM , AISI , BS , DIN , JIS , ...