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.\nWhen used with these smartpads, each stroke is accurately captured digitally in a lossless format. It also leverages the benefits from our latest pen technology using 4x pressure levels.\nWacom Ballpoint Pen comes with 3 replacement refills. This pen is a replacement pen for Bamboo Folio and Bamboo Slate.