This listing is for a Yamaha trumpet mouthpipe (lead pipe) assembly. It fits a variety of Yamaha trumpet models including 736, 737, 738, 739, 739T, and 732. It is part number A3944258. It measures 12 & 2/16th's inches in length. This is a genuine Yamaha spare part. These are generally not available directly to the public, but rather must be obtained through a Yamaha dealer. This came from the closeout of an instrument repair business. It is brand new, but shows lacquer wear and tarnish from years of storage. There are no dings or damage though.