How many milliliters is the magic pen with a scale of 5?

Does the subject want to ask "How many milliliters are the five scales of the magic pen"? 1.25 liter. According to official website's query, magic magic Pen is specially used to practice hard pen calligraphy. A pen always has four scales, one scale is 0.25 liter, and the five scales of the magic pen are 1.25 liter. Magic magic pen is a special kind of ink, the handwriting will disappear within half an hour, and it can be recycled indefinitely.