This decorative, finished piece of wood is used to cover any gaps to complete the look of your cabinetry, The flutes refer to the long, hollowed-out areas that are part of the finished design.
While most fillers are meant to cover gaps in cabinetry installation, fluted fillers go one step further and make it look like a purposeful design. Flutes are a customizable option with choices in the number of flutes (long, hallowed areas) and if you want the ends tapered or rounded. In contrast, fillers that do not have any design are called “flat fillers”.