When sourcing Fuwa axles, it is critical to verify the genuine laser-engraved serial numbers and anti-counterfeiting labels on the axle beam. Key technical specifications to confirm include the load capacity (typically 13T, 16T, or 20T), the track length, and the brake lining dimensions (e.g., 420x180mm or 420x220mm). Ensure the supplier provides a material analysis report confirming the use of one-piece heat-treated low-alloy steel beams, which offer superior fatigue resistance and structural integrity compared to welded alternatives.