The MK50 leadpipe is a replica of the Mt. Vernon 50B bass trombone leadpipe. The standard version is made of yellow brass and has an unthreaded ring for a press fit in most any bass trombone hand slide with a removable leadpipe. Threaded pipes with either Shires or Edwards threads are available by special order. The leadpipes can also be made in nickel, rose brass, bronze, or Sterling silver by request.