The tubax is a modified contrabass saxophone developed in 1999 by the German instrument maker Benedikt Eppelsheim. Although it has the same fingering as the saxophone, it has a narrower bore, smaller mouthpiece, and more compactly folded tubing. The tubax exists in E♭ contrabass and B♭ or C subcontrabass sizes. Its name is a portmanteau of the words "tuba" and "sax".