Safe and environmentally friendly, sufficient ink, smooth writing, and bright colors. The circular high-strength pen rod pattern is novel and simple, with a comfortable feel. The pen cap comes with pen clip design, making it easy to carry; Good sealing, can prevent ink leakage. The pen tip is made of fiber, which is not easily deformed, easy to write and erase, and convenient to use. Can write and draw on smooth surfaces such as blackboards, whiteboards, metal, glass, ceramics, etc.