Maintenance box model C13S210057 for Epson printers. (See under the compatibility table)
This is the reservoir where the printer leaves the remaining ink after cleaning. Inside there are some felts to absorb waste ink. When the maintenance box reaches its end of life, the printer will be blocked and it will be necessary to change the box for a new one or change the chip.
The change process is very simple, the user himself can do it easily and quickly in less than 1 minut.