Ballpoint pen is a pen tip pen, it will have a khlaikruai shape is cut off to the buttocks. Ballpoint pen with Ink viscosity within the ink will stick to the paper by the roll of a circular solid rollers. Size: approx 700-1200 μm may be made from brass, steel or tungsten carbide, the ink will dry immediately in contact with the paper. This type of pen is cheap and reliable. This type of pen's stationery that is popular in the present instead of fountain pen.