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Wek Factory Pellet Machine 1mm-16mm Ring Die for Making Shrimp Feed. Premium Alloy Steel Material: Core material is Premium Alloy Steel X46Cr13 / 4Cr13 for high hardness and wear resistance. Vacuum Quenching Technology: Uses vacuum quenching and tempering for uniform hardness distribution (HRC 52-58). Full Customization Support: Customizable hole pattern, thickness, relief holes, dimensions, and compression ratio. High Precision Manufacturing: 8-Axis High-Speed CNC Gun Drilling ensures high precision hole diameter (1.0mm-12.0mm). Mirror Polished Finish: Hole internal finish is mirror polished (Ra 0.8) for smooth discharge and reduced resistance. Long Service Life: Proven service life ranges from 800 to 2000 hours depending on raw material.