The Wacom Ballpoint Pen for Bamboo Folio and Bamboo Slate comes with 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. Wacom Ballpoint Pen comes with 3 replacement refills. This pen is a replacement pen for Bamboo Folio and Bamboo Slate.