Clarinet Saxophone Flute French Horn   Violin Family Viola Cello :+: French Horn :+: French Horn Alto,Bass Horns Trombones Trumpets Main parts are adopted special-made copper alloy tubes, tune musical tubes, sliding tubes, compact in piston coordination, flexible and light in use.     XTRO-A Type Bb Alto Trombone: 01 XTRO-A Type Bb Tenor Trombone: 02         XTRO-B Type Bb Tenor Trombone: 03 XTRO-A Type Bb Tenor Tuning Trombone: 04         XTRO-B Type Bb Tenor Tuning Trombone: 05 XTRO-A Type Bb Bass Tuning Trombone: 06         XTRO-B Type Bb Bass Tuning Trombone: 07 XTRO-B Type Bb Alto Trombone: 08