Characteristics: B 16.x1: 6-digit totalizer with manual reset. B 16.x0 and B 18.x0: 6- and 8-digit totalizers without reset. Counters without front bezel fit into bezels F1B and F2B and can be combined in RM 50 x 25 mm with socket 945.2. Very long service life (200 million pulses).