 The rarity of such objects in Southeast Asia and the range found at Co Loa is believed to possibly be unique.The drum itself is one of the largest Bronze Age drums to have been recovered from the Red River Delta, standing 57 cm high and boasting a tympanum with a diameter of 73.6 cm.The drum itself weighs 72 kg and contains around 200 pieces of bronze, including 20 kg of scrap pieces from a range of artefacts.