Morf3D, a small company specializing in additive manufacturing for the aerospace industry, has received a second round of investment from Boeing’s [BA] HorizonX Ventures unit, demonstrating the value the aerospace and defense giant sees in Morf3D.

The level of investment wasn’t disclosed. Morf3D said the new funding will support the expansion of its manufacturing footprint and ability to meet the demand from its aerospace customers. HorizonX first invested in California-based Morf3D in 2018.

Morf3D said it has been experiencing an increase in customer demand, leading it to expand its additive manufacturing footprint, boost its investment in precision machine technology, and double its workforce.

When Boeing first invested in Morf3D in April 2018, the company had 12 full-time employees.

“Our latest strategic investment in Morf3D extends our commitment to our Industry 4.0 efforts, technologies that can transform aerospace supply chains for future growth and competitiveness,” Brian Schettler, senior managing director of HorizonX, said in a statement. “We continue to work closely with Morf3D to help them bring innovation through additive manufacturing to more aerospace manufacturing partners.”

In addition to Boeing, Morf3D said its customer’s include Honeywell [HON], United Technologies Corp.’s [UTX] Collins Aerospace business, and “numerous others.”

Ivan Madera, Morf3Ds founder and CEO, said in a statement that the company’s “vision to become a world-class leader in metals additive manufacturing for the aerospace industry is truly taking form.”

Morf3D has several additive manufacturing processes around direct metal laser sintering using Aluminum, high-strength Aluminum, Titanium and Inconel.

The original HorizonX investment in Morf3D was followed last August by an investment in Digital Alloys, another additive manufacture of metal parts.