Standard unit of quantity :
Third column of tariff is ‘Unit’ which is unit of measure. The unit of measure is indicated by abbreviations. Some abbreviations are as follows – cc – Cubic Centimeter, cm – Centimeter(s), g – gram(s), g/cm3 – Gram per cubic centimeter, l – liter, m – meter, mt – Metric Tonne, t – Tonne, Tu – Thousand in number, u – Number, Vol. – Volume, W – Watt.
In many cases, there units are impractical in trade.