This J Michael trombone is a perfect instrument for learning to play the trombone. J Michael produces quality instruments using the latest technology to achieve high standards. It has the essential features of all J. Michael instruments - good intonation, easy response and good playability. The trombone features a nickel silver slide and is finished in a clear lacquer. It comes in a semi-hard case for protection Features Medium-sized dual bore Bore size: 12.70m Bell size: 204mm Clear lacquer finish Semi-hard case Dimensions (LxWxH) mm: 962 x 314 x 276