The Pentel Rolling Writer rollerball pen has a unique Cushion Ball Tip which allows you to write with light or heavy pressure with no adverse effect on the tip or the line produced. The large capacity ink reservoir enables you to write for over a mile. The 0.8 mm rollerball tip writes medium lines. Pen Sub-Brand & Product Family: Rolling Writer; Pen Type: Rollerball Pen; Pen Style: Stick; Pen Tip Type: Conical.