HSN Code 4809 refers to "Carbon paper, self-copy paper and other copying or transfer papers, incl. coated or impregnated paper for duplicator stencils or offset plates, whether or not printed, in rolls of a width 36 cm or in square or rectangular sheets with one side 36 cm and the other side 15 cm in the unfolded state." This classification code is essential for identifying copying and transfer papers for import/export purposes based on their nature, composition, and intended use. Common products under HSN Code 4809 include carbon paper, self-copy paper, duplicator stencils, and offset plates. Additionally, the GST rate for these copying and transfer papers under this code ensures accurate trade compliance.