Zebra R-301 Stainless Steel Rollerball Pen Refill, Black Ink, 2-Count Features ultra-smooth black ink for an enhanced, effortless writing experience Create a more elegant handwriting with luxurious strokes, while gliding across the paper Effortless refill process makes it the perfect choice for everyday use Vigorous quality assurance testing guarantees durable performance for all Zebra products Designed to complement Zebra's R-301 stainless steel rollerball pen