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, F-701 and Spiral Ballpoint Pens; Refill Tip Type: Conical.