Refill for F301, F301 Ultra, F402, 301A, Spiral Ballpoint, Fine, Black, 2/Pack-2 Pack Produces clean, vibrant lines to get your writing noticed. Acid-free, archival quality ink for is perfect for important documents. Zebra delivers high-quality in a name you can trust. Pen Refill Type: Ballpoint; Refill For Series: F-301, F-301 Ultra, F-402, 301A, Spiral Ballpoints; Tip Type: Conical; Point Type: Fine.