Multi-color pen Push-type ballpoint pen gel pen 10 colors

▸ Type: Push-type 10-in-1 ballpoint pen/gel pen
▸ Color system: 10-color integrated refill module
▸ Switching mechanism: mechanical press-type color change structure
▸ Nib specification: 0.7mm universal ball
beads ▸ Adaptation scene: student homework/handbook annotation scene