This is a custom-made leadpipe for the YAMAHA flugelhorn, YFH-731. Raw Brass specification. The receiver has been adjusted to ensure that Bach shank mouthpieces can be used securely. With this receiver adjustment, the distance from the rim surface to the leadpipe end is the same when a YAMAHA shank mouthpiece is attached. When using a Bach shank, please use it slightly pulled out. This is an experimental offering, so it will be offered at a lower price than usual. Thank you for your interest.