Bb/F-Trombone ASL-4220G, by Arnolds & Sons
S-Bore
Goldbrass bell plasma welded
Reinforced bell with bead wire
Nickel silver inner and outer slide
Standard Quartvalve
Open wrap F-attachment
Traditional waterkeys
Bore: 12,70 mm
Bell: 20,32 cm
Yellow brass lacquered
7C mouthpiece and comfort case