The Uni-Ball Signo Gelstick is an economy pen only in price. It's a simple long-lasting pen ideal for daily use at work or school, yet features Uni's high-grade pigment gel ink, resistant to water and light. The pen has a stainless-steel tip with tungsten-carbide ball, and high-tech twin-ball ink control to prevent leaks. Available in eight vibrant colors, this pen features a 0.7mm tip that writes a 0.5mm line.