... time 3.ISO Quality Management System 4.Professional Exporter 1045 different type Industry Sprocket Specification MaterialC45, A3, 40Cr, ... on hub)International Standard : ANSI B29.1MMaterial Selection : 1045, 1023,nylon,20CrMnTi, SCM 415, stainless steel,cast ... by ISO certificationMarket 1. Eastern Asia2. Southeast Asia3. Mid East4. Africa5.South AmericaAdvantage 1.The geographical position advantage ...