The MBT+ metal body tenor is indeed a unique 4-string only available from Gold Tone. This metal body's scale length allows for the popular 'Chicago Tuning' (DGBE) or can be tuned to standard 'tenor tuning' in fifths (CGDA). Also works superbly well for 'Irish tuning' GDAE. It is loud and has a very distinct percussive tone. Steel body, mahogany neck, rosewood fingerboard, bone nut, sealed Grover machine heads, and pearl dot position markers. The MBT+ includes a cutaway and a lipstick pickup. Please see below for more details and Gold Tone specification chart. Includes a deluxe Gold Tone 'HDRD' hard case.