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Screw Elements/Sections/Pieces for Parallel Twin Screw Extruder. Wide Diameter Range: Available in diameters from 35mm to 75mm to fit various extruder models. Customizable Dimensions: Length and inner key types can be customized according to specific demands. Premium Alloy Options: Offers W6Mo5Cr4V2 material and imported SKD61 for backflow parts. Precision Surface Finish: Fine polishing achieves Ra value of 0.2-0.4 for optimal material flow. Full Customization Service: Supports full customization, minor customization, and design-based customization. Durable Coating: Nickel-base alloy+WC spray welding with thickness of 2.6-3mm ensures longevity. One Year Warranty: Comes with a standard one-year warranty for peace of mind.