Federal officials busted seven people involved in corporate espionage for a Chinese company, the Justice Department announced Wednesday.

The seven people identified are accused of conspiring to steal trade secrets pertaining to a product called “syntactic foam,” which can be used for an array of purposes ranging from stealth technology to oil exploration. Federal officials arrested six people based in the United States, including four U.S. citizens and one Chinese national with lawful permanent resident status, and charged another person who works for a Chinese manufacturing firm.