Rollerball Medium. Retractable. Consistent ink flow. Comfort rubber grip. This retractable rollerball helps you create perfectly smooth handwriting with uni-ball water resistant, fade resistant and tamper-proof Super Ink.The pen also features a rubber grip for comfort.. Features. Clip. Yes. Stroke width. 0.7 mm. Housing material. Polypropylene (PP), Stainless steel. Writing colours. Blue. Product colour. Black, Blue, Metallic. Construction type. Clip-on retractable pen. Weight & dimensions. Weight. 13.542 g. Length. 142.1 mm. Packaging content. Quantity per pack. 12 pc(s). General. Product family. Signo