In the context of the input sentence, determine the relationship between 'Stratasys' and '3D printing'.
Options: original broadcaster, chief executive officer, product/material produced, legal form

27, 2015-- Stratasys Ltd. (Nasdaq:SSYS), aleading global provider of 3D printing and additive manufacturing solutions, will participate in the Prosthetics and Assistive Technology Challenge , a two-day event hosted by the VA Assistive Technology Program and VA Center for Innovation, July 28-29 in Richmond, Virginia at the Hunter Holmes McGuire VA Medical Center .
product/material produced