it is the good design, with high quality Specifications1.PP sheet screw for extruder 2.Material:38CrMoAIA 3.high abrasion and corrosion resistance 4.melting fast,blended well PP Sheet screw for extruderDiameter12mm-300mmMin.Order1 setMaterials38CrMoAIADiscount AvailableApplicationpp.pc.pe sheet, pipe,profilePayment TermT/T, L/CTechnical Process1.Rough Machining2.Quenching and Tempering3.Finish ...