Like many instruments, trombones are made in a range of sizes that correlate with their musical range. The most common type is the tenor trombone. The bass, contrabass, and cimbasso trombones are all pitched increasingly lower, while the alto, soprano, and piccolo trombones are pitched progressively higher.  In addition to different pitches (and relative sizes), trombones come in several varieties of hybrid models. The superbone is a hybrid of the valve trombone mentioned above and a standard slide trombone; both sets of mechanisms are fully operational for the player to use in any combination they want. The historical sackbut and its smaller bell was popular in the Renaissance and Baroque eras; the buccin ended with a bell-shaped like a dragon or serpent and sounded a little like a French horn.