It cleans it all! Use the large end for cleaning large hole and vase openings, and the small end for the small, delicate areas in greenware, such as openings in figurines, teacup handles, lace patterns, and more.
Use this brush (or Spoolie) to clean your own brushes, and the Fluid Writer wells.
The clean-up brush measure 7" long, with the smaller black-bristled end measuring 1" long with a diameter of 1/8", and the white-bristled end measuring 2" long and about 1/2" in diameter.