Zebra Z-Mulsion EQ-Refill, 1.0mm, Black Ink, 2-Count 1.0mm point size, easy-glide black emulsion ink for top of the line writing performance Combines oil, water and pigment to deliver the smoothest writing experience Quick-drying and smear-resistant while maintaining brilliant and bold writing Vigorous quality assurance testing guarantees durable performance for all Zebra products Designed to complement Zebra's Z-Mulsion, Z-mulsion EX and Z-Mulsion LX pens