F tube. The valve system is 3 pistons. Bell has a yellow brass diameter of 268.5 mm, a bore size of 11.73 mm, silver plated finish. Mouthpiece adapter (for horn) included.
B â™ pipe. Valve system is 4 pistons. Bell has a yellow brass diameter of 280 mm, a bore size of 14.5 mm (first to third) / 15.5 mm (fourth), clear lacquer finish.
B â™ pipe. The valve system is 3 pistons. Bell is yellow brass diameter 254 mm, bore size 14.5 mm, silver plated finish. First adjustment finger hook.