The alto clarinet is a win instrument of the clarinet family. It is a transposing instrument usually pitched in the key of E♭, though instruments in F (and in the 19th century, E) have been made. It is sometimes known as a tenor clarinet; this name especially is applied to the instrument in F. In size it lies between the soprano clarinet and the bass clarinet, to which it bears a greater resemblance in that it typically has a straight body (made of Grenadilla or other wood, hard rubber, or plastic), but a curved neck and bell made of metal. All-metal alto clarinets also exist. In appearance it strongly resembles the basset horn, but usually differs in three respects: it is pitched in E♭, it lacks an extended lower range, and it has a wider bore than most basset horns.