South Africa Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Guinea Bissau was US$12 during 2012, according to the United Nations COMTRADE database on international trade. South Africa Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Guinea Bissau - data, historical chart and statistics - was last updated on June of 2024.