Generally yes, if the delivery mechanism is a porous or felt tip — the heading covers porous-tipped instruments regardless of whether the medium is dye-based ink, pigment ink, or paint. However, if a 'paint marker' is essentially a pressurized paint applicator with a valve-action tip rather than a porous nib, it may be more appropriately classified elsewhere. The physical construction of the tip is the determining factor.

CBP expects commercial invoices to itemize distinct product lines separately, with unit prices reflecting the actual transaction value for each SKU. For mixed shipments, a packing list that correlates item numbers to invoice lines — along with catalog or specification sheets showing the grade distinction — reduces the risk of a single blended value being applied across products with very different market prices.