Pilot Gel G2 Rollerball Pen Refill Keep your rollerball going with Pilot Gel Rollerball Refills. Each refill is filled with a high-quality ink that dries quickly with smear-free results. Experience the smooth fluidity that only a gel rollerball refill can give you. Select from one of three brilliant ink color options. Pilot Gel G2 Rollerball Pen Refill Features