Siemens keyswitch, B, 22 mm, round, metal, shiny, special lock, with 2 keys, 2 switch positions O<I, momentary contact type, actuating angle 45°, 10:30h/12h, key removal O, note: Siemens B locking systems E1 - E25 supplied without key, customer-specific selection with SIRIUS ACT configurator (CIN)