A rectangular metal sign with sharp, clean edges, featuring a bold, sans-serif font for the 'FBC Inert Gas' text. The sign has a matte black finish with raised, slightly weathered lettering in a muted yellow, resembling industrial safety signage. The corners are slightly rounded, and the surface shows minimal wear, with small scratches and dents indicative of its placement in a high-traffic area within the brutalist architecture of the Federal Bureau of Control.