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. Refill Format: Standard Ballpoint Special Ink Type: Washable Refill For Series: Zebra F-301, F-301 Ultra, F-402, 301A and Spiral Ballpoint Pens Refill Tip Type: Conical.