The cutting edge UNI technology assures an incredibly smooth and delightful writing experience. Enjoy the best writing performance in UNI history with what deserves to be called a NEW GENERATION PEN. Addicting Smoothness, Crisp Dense lines, Extremely Quick drying. 0.7mm tungsten carbide ball, Plastic & Elastic rubber barrel, Stainless Steel Tip. Quick and light writing does not blur and stays bold. Achieves a new, smooth and light feel writing. Variable line widths adjust to your writing style.