Monteverde One Touch Engage Retractable Ink-Ball (Mv35340) THE RETRACTABLE ENGAGE draws ink just like a fountain pen. It can be filled from an ink bottle by using the ink converter and drawing ink up through the Ink Ball point or by using standard international size ink cartridges. YOUR ENGAGE INK-BALL can be left with the point in the writing position for extended periods of time with very little ink evaporation! UNIQUE DESIGN stands out from any style you've ever owned. MONTEVERDE USA PENS guarantee top quality.