1.extruder spare parts 2.Material:38CrMoAlA; 3.Highquality alloy layer 4,longer lifetime Tairong Machiney Extruder screw/extruder spare parts convenient interchangeability by agile combination.fulfill efficient self-cleaning, transmission, compounding, pressure-forming, etc.made of high tool speed W6Mo5Cr4V2, or anti-corrosion steel 38CrMoAlA by special treatment. Assembled together, they will ...