Differentiate your writing with the deep; rich write of BLX black-infused colors. Exclusive; pigment-based gel ink forms an indelible bond in paper for intense coloration and document security. Quick-drying; advanced ink helps prevent smearing. The uni Super Ink helps prevent check and document fraud. Rollerball pen writes amazingly smooth while providing crisp; vivid lines. Subtly textured grip provides a comfortable and controlled writing experience. Top plunger retracts the tip to protect purses; briefcases and other items from stray ink marks. Color of pen barren accents indicates the black-infused color. The uni-ball JetStream RT BLX Gel Pen also features an elegant pocket clip to attach to notebooks; planners and more.