The EOS M 400 is a metal 3D printer made by German company EOS. EOS are one of the oldest 3D printing companies, having been in the 3D printing industry for over 25 years in Selective Laser Sintering and DMLS. The M 400 is a metal 3D printer which uses DMLS (Direct Metal Laser Sintering) technologies.

The EOS M 400 has a large build area of 400 x 400 x 400 mm and a scanning speed of up to 7 metres per second. Additionally, this metal 3D printer weighs 4635kg and has a laser diameter of 90μm.