Stainless Steel tube, Tungsten Carbide Ball, Black German Ink.Minimum 400 metres writing distance.Please note: A good rollerball has extra smooth, free-flowing ink, which provides an effortless writing experience. It is for this reason that they have a limited writing distance, when compared with the thicker, stickier ink of a ball pen. All Alex Varga rollerball pens, with the exception of AV-19011, are supplied with a complimentary spare refill packed inside the presentation box