The best qualities of liquid ink & gel ink are blended into a super-smooth formula & are delivered via an exclusive ink / tip technology. Intensely vivid ink dries quickly without smearing or blotting, making it great for left-handed writers. Smooth latex-free grip provides uninterrupted writing comfort. Acid-free formula will not affect pH level of paper. Refillable with Pentel LR7 refill. Pen Sub-Brand & Product Family: EnerGel Deluxe; Pen Type: Gel Pen; Pen Style: Stick; Pen Tip Type: Needle.