Neo series. B â™ Compensating system. The valve system is 3 pistons. Bell has a yellow brass diameter of 240 mm, a bore size of 13.2 mm (1st, 2nd) / 14.0mm (3rd), silver plated finish.
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. Valve system is 4 pistons. Bell has a yellow brass diameter of 280 mm, a bore size of 14.5 mm (1st to 3rd) / 16.8 mm (4th), silver plated finish.
Neo series. B â™ / F compensating system. Valve system is 4 pistons. The bell has a yellow brass diameter of 300 mm, the bore size is 15 mm (1st to 3rd) / 16.8 mm (4th), silver plated finish.
Custom series B â™ / F compensating system. Valve system is 4 pistons. Bell has a yellow brass diameter of 300 mm, a bore size of 15 mm (No. 1 to No. 3) / 16.8 mm (No. 4), silver plating (partial gold plating) finish.