Express yourself brilliantly with vibrant Acroball Colors advanced ink pens. Advanced ink combines the best qualities of a gel and ball point in an innovative ink that glides across the page, yet is quick-drying. Now available in a range of colors, discover why you'll love Acroball advanced ink. Pen Sub-Brand & Product Family: Acroball Colors Advanced Ink; Pen Type: Hybrid Gel Pen; Pen Style: Retractable; Pen Tip Type: Conical.