The Pentel Rolling Writer rollerball pen is Pentel's first rollerball pen ever invented. The unique Cushion Ball Tip™ allows you to write with light or heavy pressure with no adverse effect on the tip or the line produced. Pentel's first roller ball pen ever Writes for over one mile 0.8mm tip sizeThe Pentel Rolling Writer rollerball pen is Pentel's first rollerball pen ever invented. The unique Cushion Ball Tip™ allows you to write with light or heavy pressure with no adverse effect on the tip or the line produced. Pentel's first roller ball pen ever Writes for over one mile 0.8mm tip size