Uni-ball Signo UM-151 Gel Pen - 0.5 mm - Black | JetPens
Uni-Ball - Stick Pen: 0.5 mm Tip, Black, Red & Blue Ink - 57376212 - MSC Industrial Supply
Amazon.com : Uni-ball Jetstream Extra Fine Point Retractable Roller Ball Pens,-rubber Grip Type -0.5mm-black Ink-value Set of 3 : Rollerball Pens : Office Products