Canon MC-32 maintenance cartridge (part number 1156C009AA) is a replaceable component for compatible imagePROGRAF printers, designed for replacement by the end user.
Canon lists it for the imagePROGRAF TC-21, TC-21M, TC-20 and TC-20M. For the TC-20, the distributor describes it as a waste toner container, so it collects toner during printer maintenance.
The cartridge weighs 0.319 kg and is intended for routine maintenance of the specified large-format printer models.