Tesla is sourcing some stainless steel panels for the exterior of its new Cybertruck from Finnish supplier Outokumpu, which has worked to accommodate the electric vehicle’s unconventional design, according to Bloomberg sources.

The anonymous sources said the materials will be shipped to Tesla’s assembly plant in Austin, Texas, marking a major product shift for Outokumpu.

The Helsinki based supplier is Europe’s largest producer of stainless steel and well known for working with automakers on exhaust systems, Bloomberg said.

Tesla could be sourcing the materials from Outokumpu’s plant in Calvert, Alabama, and may be using more than one supplier, the Bloomberg sources said.

Outokumpu declined to comment to Bloomberg and Tesla didn’t respond to requests for comment.