Bb/F-Trombone mod.ASL-420G, by Arnolds & Sons

ML-Bore

Goldbrass bell plasma welded

Reinforced bell with bead wire

Nickel silver inner and outer slide

Standard Quartvalve

Closed wrap F-attachment

Traditional waterkeys

Bore: 13,33 mm

Bell: 21,59 mm

Goldbrass lacquered

6 1/2 AL mouthpiece and comfort case