The Nostromo, an M-Class Lockmart CM 88B Bison starfreighter, was property of the Weyland-Yutani Corporation. It hauled a mile-long ore refinery that, on its final voyage, processed 20 million tons of raw ore. Valued at $42 million in adjusted dollars, the Nostromo processed raw material on the long trip to Earth. The ship itself weighed, over 60,000 metric tons, included three decks, four holds, stores, and engines and a shuttle named Narcissus. The ship was fitted with a self-destruct system. It was connected to the ore refinery platform via an umiblical detachment system.