HSN Code 6603 refers to "Parts, trimmings and accessories for umbrellas and sun umbrellas of heading 6601 or for walking sticks, seat-sticks, whips, riding-crops and the like of heading 6602." This classification code is essential for identifying components related to umbrellas and walking aids for import/export purposes based on their nature, composition, and intended use. Common products under HSN Code 6603 include umbrella ribs, handles, canopies, and decorative trimmings for umbrellas, as well as parts for walking sticks and whips. Additionally, the GST rate for these items under this code supports accurate trade compliance.