Rotary ballpoint pens are made of high-quality plastic materials in various colors. The shell is made of plastic that is odorless, non-toxic, unbreakable, non-deformable, resistant to high and low temperatures, and abrasion-resistant. The high-life bullet-type ink cartridge can be customized according to customer needs. The ink cartridge tube contains a tube-shaped object with ink or ink, and the front end has a metal tip. The tip is embedded with a round writing ball. All of these are made of environmental-friendly high-quality materials. Suitable for business office, advertising promotion, study, or giving friends. 12 pieces per package, 2400 pieces per piece, with many colors to choose from, and wholesale prices to be negotiated.