GANSSIA Colorful Cats Design 0.38mm Gel Pens Black Ink Pack of 6 Pcs Ink color: Black Pen Refill Point: 0.38mm Kawaii design gel pens. School educational supply, best gift for children. Great pens to sketch, draw, color, and write in a fun way. You can use it to write notebook or decoration in many ways, use your imagination.