Analyze the relationship between 'Stratasys' and '3D printing' within the context of the input sentence.
Options: location of formation, headquarters location, brand, product/material produced

“We needed to look beyond our factory walls to get a more complete sense of where 3D printing is headed, so we turned to those who live and breathe the technology just like we do – professional users,” said Joe Allison, CEO of Stratasys Direct Manufacturing.
product/material produced