Pentel Refill Ink for EnerGel and Lancelot Gel Pen, 0.7mm Metal Tip, Sky Blue Ink, Pack of 12 (LR7-S) Standard refill for any refillable EnerGel pen, including models: BL407; BL77; BL107; BL117; BL57; and BL37 High performance ink technology combines the best qualities of liquid and gel ink for a super-smooth writing experience Liquid gel ink dries so fast even left handed writers love it - no smears, no smudges, no globs Box contains 12 ink refills Sky Blue Ink