The Cross Ballpoint Pen Refill in blue fine point 8512 is a high-quality writing instrument accessory manufactured by A. T. Cross Company in the United States. Made of durable metal, this pen refill features a fine point for precise and smooth writing. The convenient package includes one black medium refill, providing versatility in ink color options for your writing needs. Perfect for collectors or those looking for reliable pen accessories, this Cross product is a must-have for any pen enthusiast.