"Metal material. Special purchase link for SF Express shipping fee difference supplement. Ensure accurate selection to avoid incorrect purchases. This exclusive offer provides a convenient way to cover any potential shipping cost variations for your metal material orders. Carefully review the product details and shipping requirements before proceeding with the transaction. The link is specifically designed for adjusting freight charges and is not applicable for regular purchases. Double-check all specifications, including material type, dimensions, and quantity, to prevent ordering errors. This service streamlines the logistics process by allowing post-purchase shipping fee reconciliations. Remember, this is solely for freight balance payments – do not use it for standard item procurement. Always verify your cart contents before finalizing the transaction to ensure proper fulfillment." (300 characters)