A 28-year-old man has been sentenced to eight and a half years' imprisonment for importing and possessing 17.9kg of methamphetamine.
It is estimated the drugs would have had a street value of up to $9 million in New Zealand.
The Canadian passport holder, Jingyuan Zhang, was allegedly on "holiday" in New Zealand, arriving with a travel companion at Auckland in January.
Zhang then stayed in temporary accommodation in south-east Auckland before he was arrested by Customs.
Customs examined mail from the United States addressed to the man in March and found 12 printer toner cartridges with finely powdered methamphetamine in them.