Key: Bb Tube Diameter: .748" (19mm) Speaker port size: 17,7" (450mm) Tube body/speaker port material: brass Key system/number of keys: 3B™ linkage system/4-turn valve key Appearance: ● Varnish ● Silver plating
Key: Bb Tube Diameter: .748" (19mm) Speaker port size: 17,7" (450mm) Tube body/speaker port material: brass Key system/number of keys: 3B™ linkage system/4-turn valve key Appearance: ● Varnish ● Silver plating