The Pentel BLN75 Rollerball Pen (4902506070883) is a black pen featuring Pentel's Rollerball pen technology. It has an ergonomic triangular design that fits comfortably in the hand, reducing fatigue during extended writing sessions. The long-lasting rollerball tip ensures a smooth, consistent line on the paper, while its quick-drying ink prevents smearing. The pen also features a pocket clip for ease of transport, as well as a twist-style capping mechanism for quick and easy refilling. It is an ideal choice for students, professionals, and anyone who needs to write for long periods of time.