V-Cone Knock Retractable Water-Based Ballpoint Pen / Pilot

• Mechanism: Retractable (knock)
• Ink Type: Water-based dye ink
• Tip Sizes: 0.5mm (Extra Fine), 0.7mm (Fine)
• Ink Colors: Black, Red, Blue
• Total Length: 144.3mm
• Maximum Diameter: φ11.1mm
• Weight: 11.4g
• Body Material: Resin, Rubber
• Clip: Metal
• Grip: Rubber

Liquid water-based ink has long been prized for its bold, vivid lines and smooth flow, but it comes with a structural problem: expose it to air and it dries on the tip, making a retractable design almost impossible without risking clogging or leaking. The V-Cone Knock exists because Pilot solved that problem with a low-viscosity ink formulated specifically for the retractable format, resisting evaporation at the tip while still flowing freely onto paper.

The pen also addresses one of the common complaints about water-based ink: slow drying and smearing. The dedicated formula dries faster than conventional liquid water-based ink and holds up when the page is rubbed. A metal clip adds rigidity and a quality feel without adding bulk, and the rubber grip keeps the pen steady during extended writing sessions. The V-Cone Knock is essentially the answer to the question: what would a liquid water-based pen look like if you removed the cap entirely?