Pilot BVRF-8EF-B Refill – 0.5mm – Black

Pilot BVRF-8EF-B Refill – 0.5mm – Black This refill contains Pilot’s special low-viscosity Acro Ink, which has a fifth of the viscosity as their regular oil-based ink pens. BVRF-8EF-B Refill for Pilot Dr. Grip 4+1 Multi Pen – 0.5mm Black Ink