When shipping metal materials via SF Express, it is crucial to accurately calculate and pay the correct postage difference to avoid any delivery delays or additional charges. Please ensure that all order details are carefully verified before finalizing your shipment. Incorrect orders may result in processing errors, returned packages, or unexpected fees. Always double-check the weight, dimensions, and destination to ensure the postage is calculated correctly. Utilize the official SF Express payment link for any outstanding postage differences to guarantee a smooth and efficient delivery process. Your attention to these details helps prevent unnecessary complications and ensures timely receipt of your metal materials.