Touch it! Write and feel it! This is a smooth "acroball" multi-color ballpoint pen. Touch it! Write and feel it! This is a smooth "acroball" multi-color ballpoint pen. Features: A popular Acroball Series multi-colored ballpoint pen with smooth writing and dark ink strokes. Uses a newly developed oil-based ink that allows for smooth and deep writing. Superior water resistance that can only be found in oil-based inks. The grip part has evolved into a more stable grip. The clip is equipped with a "lift clip mechanism" that uses a coil spring that will not break down even after 100,000 times (based on our test data).