Section 15 BASE METALS AND ARTICLES OF BASE METAL 81 OTHER BASE METALS; CERMETS; ARTICLES THEREOF 81 03 TANTALUM AND ARTICLES THEREOF, INCLUDING WASTE AND SCRAP. 81 03 20 UNWROUGHT TANTALUM, INCLUDING BARS & RODS OBT. SIMPLY BY SINTERING;POWDERS Commodity Code Description 81 03 20 00 UNWROUGHT TANTALUM, INCLUDING BARS & RODS OBT. SIMPLY BY SINTERING;POWDERS