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High Efficiency Zlyj375 Single Screw Gearbox for Plastic Extrusion. High Precision Gears: Gear accuracy is 6, ensuring low noise and high performance. Durable Gear Material: Made of 20CrMnTi with hardness HRC 58-62 degrees. Leak-Proof Design: Double oil seals on shafts prevent oil leakage effectively. Customizable Connections: Screw barrel connections can be customized per customer needs. Versatile Installation: Supports both horizontal and vertical installation layouts. ISO 9001 Certified: Company holds ISO 9001:2015 quality system certification. High Production Capacity: Annual production capacity reaches 50,000 sets. OEM/ODM Service: Customization available for OEM and ODM requirements.