What this class covers:

This class covers raw and semi-finished metal products, including building materials like steel beams, nails, and pipes. It also includes common metal goods like safes, locks, and metal containers. Items must be primarily made of metal to fit in this category. Finished goods, such as furniture or jewelry, fall under other classes.

What this class covers:

This class includes construction materials that aren't made of metal, like bricks, glass, and lumber. It covers everything from cement to roofing shingles. Prefabricated non-metal buildings are also included. However, metal building materials belong in Class 6.