The Dango VECTOR POINT™ Ink Cartridge delivers a rich black line with an exceptionally smooth writing feel. Built in a compact metal-body format comparable in size to the Schmidt 4889M and Fisher Space Pen® SPR4 cartridges, VECTOR POINT is compatible with many pens designed around the popular mini cartridge standard. Engineered for clean, consistent performance that glides effortlessly across the page — smooth like velvet.