Take context from the input text and decide on the accurate relationship between 'Stratasys' and '3D printing' from the options provided.
Options: operator, position held, product/material produced, chairperson

Following the longstanding success of using Stratasys PolyJet and FDM 3D printing for prototyping applications, the company now deploys its Fortus 3D Production Systems to expand its direct manufacturing services to customers.
product/material produced