This Trombonist's Music Stand is specially designed to accommodate the trombonist. A neck connecting plate - in the back of the desk is designed to be offset to either side of center to eliminate interference with the shaft and the trombone slide. This plate can be located either to the right or left side for those musicians preferring to play with the bell down - closer to the stand, or with the bell up and to the left of the desk. The fasteners needed to connect the plate in the desired position are included. - the manufacturer