This gel ink pen has a quick-drying, water-based ink that creates a smooth universal writing or sketching experience whether you're left or right-handed, and prevents bleed-through on paper. The ink comes in a variety of vibrant colors with a 0.5mm tip. It also has a built-in mechanism to prevent ink from drying out or flowing incorrectly. The pen has a clip for easy storage in a pocket, lanyard, or closed notebook, making it perfect for on-the-go use. When the ink runs out, they can be easily refilled. Easily know the ink levels thanks to the clear frosted pen body. ⚠ Warning: Cancer - https://www.p65warnings.ca.gov/ Measurements: N/A Country/Region of Origin: Japan Materials: Body: Polycarbonate Upper Tip: ABS Resin Spring Screw: Copper Refill Body: PP Refill Tip: Copper - Ink Type: Water based.