Pentel Energel Refills LR7 LR7BP2C 23237, Blue Ink, 0.7mm Medium Point, Pack of 2. Fits the following pens: EnerGel Deluxe RTX, EnerGel Pearl, EnerGel Deluxe, EnerGel-X and EnerGel Alloy RT or any refillable EnerGel liquid gel pen. High performance ink technology combines the best qualities of liquid and gel inks for a super smooth writing experience. Liquid gel ink dries so fast even left-handed writers love it - no smears, no smudges, no globs.