Rolling Ball Pens 0.5 mm Japanese Quick Drying Fine Point Pens Liquid Ink Smooth Writing for Office Student Back to School Supplies. Super Quick-Drying Ink: Precision tip rollerball ink dries quickly to keep work neat and organized. Extra Fine 0.5mm Point: 0.5mm fine point ensures precise writing, small and delicate for detailed work. Leak-Proof Transparent Design: Unique transparent tube allows visible ink supply with guaranteed leak-proof performance. Smooth Flowing Ink: Built-in precision ink output regulator ensures even flow for a smooth writing experience. Non-Toxic & Safe: Meets ASTM D4236 and EN71-1,2,3&9 standards; suitable for ages 3+ and adults. Durable & Fade Resistant: Premium ink keeps brilliant black color without fading for long-lasting notes. Versatile Usage: Writes smoothly on most surfaces; ideal for school, office, and business use. OEM & ODM Services: Professional design team offers free service for custom branding and manufacturing.