Pentel EnerGel Deluxe RTX Liquid Gel Ink Pen Set Kit, Pack of 3 with 4 Refills (Blue - 0.7mm) High performance ink technology combines the best qualities of liquid and gel ink for a super-smooth writing experience 0.7mm stainless metal tip writes medium lines Retractable and conveniently refillable with Pentel LR7-C ink refills. Latex-free grip for writing comfort and control