Retractable ballpoint pen features a translucent barrel for monitoring the ink supply. Low-viscosity ink delivers smooth easy writing. Viscosity ink writes like a gel pen, but delivers the permanence and long write-out of a ballpoint pen. Ballpoint pen includes a noncorroding metal tip and push-action retractor. Pocket clip indicates ink color. Refillable pen also has a replaceable ink cartridge. Refillable.