Model equipped with "JETSTREAM Lite touch ink" Feature 1: It has a new ink that reduces writing resistance than conventional products, and provides a more "malley" writing experience Feature 2: Designed and designed for comfort and comfort Ball Diameter: 0.02 inches (0.5 mm); Ink Color: Black, Red, Blue, Green Size (Diameter x Thickness): 0.5 x 0.7 x 5.6 inches (13.8 x 17.9 x 141 mm); Weight: 0.6 oz (16.4 g)