Alto saxophone

Alto saxophone made entirely of silver-plated brass, consisting of a conical tube with a U-bend that terminates in a bell flare, and having a curved neck (crook) where a single-reed mouthpiece is fitted. The neck joins the body through a ligature screw socket. It has 21 cylinder-cup keys mounted in posts with rods affixed to plates, with flat and needle springs attached to keys or posts. There are ebonite rollers between B and C-sharp keys, and between C and E-flat keys. The key paddings are of red felt. The instrument has a wooden mouthpiece with silver-plated ligature and cap. Nominal pitch: E-flat.