Israel supplies Iran with fertilizer, irrigation pipes, hormones for milk production, seeds, and fruit; Iran, meanwhile, provides Israel with marble, cashews, and pistachios. Based on the same report in November 2000, the Iranian government asked an Israeli company, which built Tehran's sewage pipes 30 years earlier, to visit the country for renovations. Shortly afterwards, the assistant director-general of Iran's Ministry of Agriculture visited Israel secretly and stayed at the Tel Aviv Hilton Hotel.