Tonga Imports of vegetable tanning extracts; tannins and their salts, ethers, esters from New Zealand was US$22 during 2021, according to the United Nations COMTRADE database on international trade. Tonga Imports of vegetable tanning extracts; tannins and their salts, ethers, esters from New Zealand - data, historical chart and statistics - was last updated on August of 2026.