Depends on the commodity and/or density of the shipment, ie, how many pounds per cubic foot is the shipment matched up to a chart of classes ranging from class 50 to class 500. Some commodities are classed on density and others are classed on specific named goods, factoring in density, value and handling characteristics.
70
NMFC Freight Class 70 would be something like acorns or other shelled nuts.
70
NMFC# 50915 class 70 for steel
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