The UNI-BALL AIR UBA-188EL-M Sky Blue Micro Roller Pen is engineered for effortless, fluid writing with a unique variable line width that adjusts to your writing pressure. Its advanced Uni-Flow ink system provides consistent ink flow without skipping or blotching, ensuring a smooth and uninterrupted writing experience. The waterproof and fade-resistant ink guarantees long-lasting, smudge-proof results, making it perfect for important documents, signatures, and everyday writing. The lightweight, ergonomic design offers enhanced comfort, reducing hand fatigue during extended use. Whether for school, office, or creative writing, the UNI-BALL AIR UBA-188EL-M delivers professional-quality performance in a stylish sky-blue design