10 Black Ion Gel Ink Refill [Bulk Packing] for Cross Roadster, Vice, Penatia Gelicious , and Matrix Pens 10 Black Refill for ion , Matrix, Vice and Roadster pen Frictionless ink Flow.Satisfaction guaranteed Fits ion pen, Matrix, gelatious pump and Roadster pens flawless and lasting design Tip protected by seal to avoid evaporation.