Faber-Castell Medium Ballpoint Refill - Black. For ballpoint pens. Black ink. Medium point grade. Length 98mm. Approximate line width for M = 0.4mm. Refill for most Faber-Castell ballpoint pens (including Ambition, e-motion, Basic, Ondoro, Loom, Grip 2011, Conic and Poly Ball), Graf von Faber-Castell and Porsche Design ballpoint pens. Newer Faber-Castell Grip Plus Ball pens use this refill, while older models use the older Grip Plus ballpoint refill. Standard 'Parker-style' G2 compatible refill, fits a wide range of pens.