Siver Marching Baritone for Sale by Blessing Instruments The BM311 is a forward bell baritone with a huge, resonant sound. It is designed with a large shank mouthpiece and large bore allowing for greater blowing freedom to facilitate the volume demands of outdoor playing. The compact wrap design affords a balanced, focused sound making the BM311 an excellent choice for any marching band in a parade or on the field. Silver Plate Finish. Silver plating is a richer looking finish. Because it is thinner compared to a lacquer finish, the sound is more responsive and resonant with added brilliance and better overall projection. It is considered more durable but does require extra maintenance. .571” Bore 10” Bell Diameter Rose Brass Lead Pipe Yellow Brass Body Material Yellow Brass; Two-piece Bell Plastic Finger Buttons Stainless Steel Valves Silver Plated Finish