
Thickened Steel Leaf Springs for Trucks Diesel & Electric Vehicles Automobile Semi-Trailers & Electric Tricycles Suspension Spring Axle Parts. Direct Manufacturer: BOSSWINN operates two dedicated production facilities controlling quality from raw material to finished product. High-Grade Alloy Steel: Manufactured from SUP7, SUP9, SUP10, and other high-grade alloy steels for superior load-bearing capacity. 100% Quality Inspection: Every leaf spring undergoes rigorous 100% quality inspection, including hardness and visual checks. Customization Options: Offers full customization, minor customization, and flexible options based on samples or designs. Precision Manufacturing: Utilizes automated CNC rolling mills and strict quality controls for dimensional accuracy and consistency. Durable Surface Finish: Available in Glossy Black, Matte Black, Grey, Red, and Galvanized finishes for maximum corrosion resistance. Flexible MOQ Policy: No minimum quantity for trial orders; recommends 10,000+ pieces for mass production to ensure cost-efficiency. Fast Standard Delivery: Standard production lead time is 10 to 15 days for regular orders, with peak season times up to one month.