The Neef Masters 118 Mop Brushes Are Made Of Pure Black Synthetic Squirrel Hair, It Has The Shape Of A Large Round Brush When Wet. The 118 Brush Is Truly A Magnificent Watercolor Tool That Comes To A Fantastic Point. No Other Synthetic Mop Can Perform As Well In This Shape. Every Watercolour Painter Will Fall In Love With This Great Brush.