Conforming to ANSI,DIN,JINS,ISO standard, For the Nonstandard parts which ... machining > Painting 2. Material: Alloy Steel, Quality Carbon Structural Steel, Cast Iron, Brass etc. 3. Heat Treatment: Induction harden with High/Middle ... OEM/ODM items are always welcomed, looking forward to establish win-win business relations with you in the near future. Cast Iron Sprockets