This is a collaboration product between Pentel's Stein and graniph from 2011. It is now discontinued and a rare item. It is 0.3mm. Instant purchase is OK. Please check the product condition from the photos. [Packaging of the product] The main body will be waterproofed, wrapped, and shipped. ⚠️Notes on transactions⚠️ * If you have any questions, please ask before purchasing. * Colors may appear different in the photos than in reality due to amateur photography. Please also note that colors may appear different depending on your computer monitor or smartphone's color settings. * Please refrain from purchasing if you do not understand that this item is stored at home, inspected by an amateur, and is a used item. We inspect the items carefully, but there may be oversights.