The Longer Monorail for the ACTUS camera system can optionally be mounted to the ACTUS as well as the ACTUS-DB.

For the ACTUS: The use of a longer bellows AC-214 is needed when the total length of the monorail will be used.

For the ACTUS-DB: The use of a longer bellows ACDB-254 is needed when the total length of the monorail will be used.