NOI, lead or lead alloy, containing over 80 percent lead, Applies only on articles manufactured solely by a casting or extruding process, in boxes or drums, having a density of 30 pounds or greater per cubic foot, Density must be shown by shipper on shipping orders and bills of lading at time of shipment. If density is not shown and shipment is inadvertently accepted, class will initially be assessed under the provisions of item 110100, naming 'Lead Articles, NOI. Upon satisfactory proof of actual density, class will be adjusted accordingly.