Buy Uni Jetstream 3-Color 0.38mm Ballpoint Pen for only ₹800.00 at SCOOBOO! uni The Uni-ball Jetstream is one of our all-time-favorite pens, and it's not hard to see why. Featuring a special low-viscosity ballpoint ink, the Jetstream combines the smoothness, waterproofness, and fast drying times of a ballpoint pen with the vibrant color and crisp, consistent lines of a gel pen. Its ink cartridges feature a special spring mechanism that prevents ink leakage, plus a twin ball in the back of the tip to prevent backflow. This multi pen combines three colors of Jetstream ink into one convenient multi pen—perfect for hardworking students and professionals.