Botswana Exports of glass in balls (other than microspheres), rods or tubes, unworked to Zambia was US$222 during 2019, according to the United Nations COMTRADE database on international trade. Botswana Exports of glass in balls (other than microspheres), rods or tubes, unworked to Zambia - data, historical chart and statistics - was last updated on May of 2024.