Gel pen carbon water-based pen needle barrel bullet 0.5mm

▸ Nib Type: Needle/Bullet Dual Structure
▸ Writing Line Diameter: 0.5mm Standard Handwriting
▸ Ink System: Carbon Water-based Quick-Drying Ink
▸ Adaptation Scene: Compatible Design of Exam Answer Sheet
▸ Color Identification: Red Pen Barrel Color Rendering Scheme