South Africa Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Tonga was US$4.11 Thousand during 2016, according to the United Nations COMTRADE database on international trade. South Africa Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Tonga - data, historical chart and statistics - was last updated on June of 2024.