12 Pentel Refill Ink BL57/BL77 EnerGel Liquid Gel Pen, 0.7mm, Metal Tip, Blue
Standard refill for any refillable EnerGel pen, including models: BL407; BL77; BL107; BL117; BL57; and BL37. Quick-drying ink is ideal for left-handed writers. This unique blend of liquid and gel inks produces vibrant, long lasting colors.