Jo-Ral Bubble Trombone MuteJo Ral Bubble mute for tenor trombone model TRB 3 Edgy with a loud, meaty buzz, the tenor trombone bubble mute offers a wonderfully distinctive sound unmatched by any other. Its large, bubble shape produces free blowing sound in all registers and it fits all tenor trombone bells. The Jo Ral TRB 3 Tenor Trombone Bubble Mute has a unique shape and spun aluminum construction that give it a distinctive tone especially desirable for jazz musicians. Jo Ral