FeaturesRobust rollerball for expressive, broad handwritingSuper Ink technologyWater, fade and tamper proofWindow barrel1.0mm nibIdeal for expressive, broad handwriting, the Uni-Ball UB-150-10 Rollerball Pen Broad (Pack of 12) has a broad 1.0mm nib with uni-flow consistent ink delivery. The Super Ink technology delivers a smooth, clear black line and the ink is water, fade and tamper proof. The rose-gold barrel features a window which allows you to see when the ink is running out.