Smooth, clean and crisp. Vibrant gel ink. Reliable, high quality. Refill Format: Standard Ceramic Rollerball; Special Ink Type: Archival; Refill For Series: Cross Selectip Gel Ink Roller Ball Pens; Refill Tip Type: Conical.FeaturesCross 8523-2Black ink8523-3To be used with Selectip rolling ball pens..