1.auto part/auto accessories/automobile part 2. Made by Continuous Cast Iron Tube ... Cast Iron--High Ni Cast Iron...III. Specification: ---Cross-Section:Round,Rectangle,Elliptic,Hexagonal ---OD:60-320mm, ... ,such as railway vehicle, oil machine,engineering machine,auto parts,compressor, hydraulic and pneumatics,chemical pump, machine ... gear Mine mechinanismwear resist sleeve, engine cylinder auto part