This is a set of two black 0.7mm BVRF ballpoint pen refills compatible with PILOT Dr.GRIP Acroball pens. They feature smooth writing with oil-based Acro ink. Compatible with Dr.GRIP 4+1 and Acroball (multi-color/multi-function) ballpoint pens. 【Brand】PILOT 【Product Name】Ballpoint Pen Refill BVRF BVRF-8F-B 【Ink Color】Black 【Ball Diameter】0.7mm 【Quantity】Set of 2 【Condition】Unused One of the two was opened and inserted into an incompatible pen, and it was immediately apparent that it was incorrect, so it is unused. The other one is new and unopened. ◉I am also selling on other sites, and there may be cases where the item is out of stock if purchased immediately. You are welcome to purchase immediately, but if the item is not available due to a timing issue, I may have to cancel the transaction. If you are concerned, please inquire beforehand. Thank you.