Bullet type: The pen tip of this gel pen looks like a bullet. In the manufacturing process, we cut an original rod into a complete nib by metal cutting. The bullet type is suitable for making thicker pens, which are mostly 0.5MM in the market, and the thickest one can reach 1.2.
Needle: This kind of pen is called "full needle". The key difference between it and the bullet pen is that it is processed by non-cutting method. Before it is processed into a pen tip, it is a complete thin tube, and three concave points are punched out at the front end of the thin tube from three directions with precision instruments to form the bowl seat of the ball; The thin tube at the back forms a triangular oil groove. The ink flows out through the oil tank, and then the ink is brought out by the rolling of the ball to complete the writing process. Needle tube type is suitable for manufacturing thinner pen tips, such as 0.30 and 0.25.
Semi-needle tube: the semi-needle tube is between the bullet and the needle tube, which is more beautiful in appearance. The nib can be as thin as a needle tube and the tail can be as big as a bullet. The semi-needle tube type can be used as a thinner pen tip, such as 0.48, 0.35 and so on.