Paper Mate G-Force, Titanium and X-Tend Medium Tip Black Lubriglide Ink Pen Refills, Pack of 2 (5640736PP) Ink refill for Paper Mate G-Force, Titanium, and X-Tend ballpoint pens. Features 1.0 mm medium point. Lubriglide ink system provides smooth writing. Refillable. Experience Paper Mate quality time after time. Delivers smooth, consistent performance Color: Black Ink Experience Paper Mate quality time after time Sold As: Pack Delivers smooth, consistent performance Color: Black Ink Experience Paper Mate quality time after time Sold As: Pack