Pentel Arts Pocket Brush Refills, Black Ink / Value Set of 12 With Our Shop Original Product Description This is Refill for Pentel Pocket Brush Pen. (FP10BP) /Total 12 Refills Permanent pigment ink is both fade and water-resistant Refill cartridges make for an easy, no mess ink replacement Portable, neat and easy-to-use versus traditional paint and brushes