Utilize the input text as a context reference, choose the right relationship between 'Airbus' and 'aircraft' from the options.
Options: founded by, owner of, position held, product/material produced

The airline had placed a firm order with plane maker Airbus SAS for 100 A320 aircraft in June 2005, all of which were delivered by 3 November 2014, two years ahead of scheduled.
product/material produced