Zebra Z-Grip Retractable Ballpoint Pen 1.0mm Point Size Black Ink 40 Pack The Z-Grip is Zebra best selling Retractable Ballpoint. Transparent barrel allows constant monitoring of ink consumption. Economy pack of 40 Black Z-Grips. 1.0mm nib writes a 0.7mm line. Features a rubber "Comfort Grip" and metal clip.