... steel 1) Customer's drawing 2) High Quality Large Modulus Spur Gear for Heavy-Duty Machinery :We are a reliable supplier that ... , Coupling, BOP Body, Tube Plate, Roller Forging, Ring Forging, Gear Blank, Gear Wheel. 2. Materials: Carbon steel, Alloy steel 3. Supplying range ... : ISO9001: 2000, CCS 11. OEM and Customized service offered Large Modulus Spur Ring Gear