Writech Liquid Ink Rollerball Pens feature a precise 0.5 mm nib, ideal for smooth and clear writing. This set includes 4 pens in different colors, perfect for organizing notes or adding variety to your work. Designed for comfortable, effortless writing, these pens help reduce hand fatigue during extended use. Suitable for both professional and personal tasks, they deliver consistent ink flow for clean, vibrant lines every time.