Take context from the input text and decide on the accurate relationship between 'GrafTech' and 'graphite' from the options provided.
Options: location of formation, member of, legal form, product/material produced

GrafTech our graphite electrode producer generated company EBITDA of $40 million this quarter, due to lower volumes and sale prices as the global economic slowdown has impacted demand for graphite electrodes.
product/material produced