The Wacom Ballpoint Pen comes with a 1.0 mm tip using a black oil ink cartridge. The oil ink and the medium diameter allows for quick and loose sketching with longer lasting ink. When used with these smartpads, each stroke is accurately captured digitally in a lossless format. In addition to these features, it also comes with 3 replacement refills and can serve as a replacement pen for the Bamboo Folio and Bamboo Slate.