טרומבון בס Sierman ST-81

Model: ST-81   Custom line Bass Trombone

Key:Bb/F/Gb/D

Bell material: yellow brass from Taiwan

Bell size: 245mm

Bore size: 14.30mm

Slide material: nickel silver inner slide/yellowbrass outer slide

Rotary valve section with German MiniBal linkage

Including deluxe soft case/ German valve oil & accessories