... .The best quality and reasonable price 4.Chain wheel can be design The materials of the chain wheel can be produced according to Buyer ... , Coupling, BOP Body, Tube Plate, Roller Forging, Roller Shell, Ring Forging, Gears, Gear Blank, Gear Shaft, Gear Wheel. 2. Materials: Carbon steel, Alloy ... . Certification: ISO9001: 2000, CCS 10. OEM and Customized service offered Chain wheel