Brother - Ink Absorbers / Maintenance Boxes / Waste Ink Assemblies

What happens to the ink that your printer does not use?  Non-laser Brother printers have a Waste Ink Assembly Box.  They generally have a life span of 75k - 100k pages.  It is always a good idea to look at the box that requires replacement before purchasing - Many Brother printers have several Waste Ink Assemblies!  These parts do NOT come with installation instructions!