Agion® antimicrobial technology, with Zeomic® Type AJ Silver Zeolite A, suppresses the growth of algae, mold, mildew, fungi and bacteria on the pen which cause unpleasant odors, discoloration, staining, deterioration and corrosion. Medium point creates clean, crisp lines. Choose the smooth-flowing refill pen made specifically for the PM Company Preventa Counter Pen.