Sierman ST-81 Bass Trombone
Sierman ST-81 Bass Trombone, Bb / F / Gb / D Bass Trombone, Bore: 14.30 mm, Bell: 245 mm (9.5""), Bell, body and outer slide made of brass, Pull bow and inner pull made of nickel silver, Exchangeable mouth tube, Clear lacquered, Includes deluxe soft-case