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Screw Barrel of Plastic Bag. Premium Material: Made from 38CrMoAlA and 42CrMo high-quality alloy steel. High Precision: Screw straightness ensured at 0.015mm via advanced CNC equipment. Versatile Application: Suitable for granulation of PP, PE, PA, PC, ABS, and AS materials. Custom Manufacturing: We manufacture various screw barrels according to customer requirements. Expert Manufacturer: Factory with 24 years history and 15000 sqm production area. Global Export: Exported to Russia, Brazil, Egypt, and Southeast Asia.