Product Details - Quantum Gelo Plus, action ballpoint pen X5 Ball Point Pen 0.5mm. Blue (50/Pack) - Oil-based ink for deep color and smearproof after use,Ultra Low Viscosity Gelo Plus ink for smoother writing - Pen point is made of Nickel-Silver and Ball point is made of Tungsten Carbide facilitating durability, broken tip prevention - Soft rubber Grip Zone for contoured handling - Clear black handle with push buttons in assorted colors,Pocket clip for portability