
Durable Leaf Springs for Semi-Trailers - Heavy-Duty Auto Components. Customized Color Options: Available in Black, Grey, and Dacromet finishes to meet specific requirements. OEM and ODM Services: Full design and development support with hundreds of successful projects delivered. IATF 16949 Quality System: Strict quality control from raw materials to finished product testing with factory reports. Comprehensive Testing Equipment: Includes spectrometer, universal testing machine, and fatigue life verification benches. Durable Material Composition: Constructed from high-grade SUP7, SUP9, SUP10, and SUP11A steel alloys. Custom Logo and Label Printing: Supports logo printing, label printing, and stamping on leaf springs. Advanced Surface Treatment: Features shot peening and electrophoretic painting for enhanced corrosion resistance. Flexible MOQ Options: 50 pieces for common sizes; 5 tons or more for special material sizes.