In the maintenance section you will find all the wearparts you need to replace regulary to keep your printer running perfectly all the time.
Filters and dampers to hold back all ink particles and prevent the printheads from clogging.
Caps to keep your printheads stored properly and prevent from drying when not printing.
Wipers to keep the nozzles clean during operation.
UV-bulbs that should be changed before they lost the needed energy to keep your prints cured 100% all the time.
And many other items, that wear out from time to time and is good to have some spare ones in stock.