High precision tip. Wear-resistant, hard chrome-plated thin tip allows for working in exquisite detail. The rOtring technical pen ink (not included) features a high density of pigment particles for opacity and lightfastness, ensuring line sharpness and adhesiveness. It dries quickly on media and is waterproof. This pen can be used on a variety of surfaces such as lineboard, tracing paper, or vellum drawing paper. The ink bottle is not included. The refillable ink reservoir is ideal for frequent drawers using bottle inks. The push-on sleeve allows for fast cleaning and easy access to the ink helix.