Uni-Ball® 207 Black Bold Retractable Fraud Prevention Gel Pen Featuring Super Ink Which Helps Protect Against Document Alteration. The Pens Deliver Archival-Quality Ink That Becomes Trapped In Paper And Assists In Preventing Check Washing. Super Ink Is Specially Formulated To Become Trapped In Paper, Helping To Prevent Criminal Check Washing And Other Document Alteration. Visible Ink Supply Makes It Easy To Monitor The Level Of Remaining Ink.