High-tech Core pens from Rotring are modern, contemporary and the ideal writing instruments. The techno styling of these wruiting instruments is detailed with an ergonomically shaped design of its grip section. Striking ribbed barrel provides exceptional writing comfort and control. Comfortable to hold, light and friendly to grip, the pen rests in your hand while the fine lead produces all the pleasures of smooth writing. The bold colors and wild patterns are combined with different textures to serve as the basis for distinction. The fountain pen's distinctly shaped medium nib is made from stainless steel and fills via a cartridge or converter. The ballpoint pen and mechanical pencil, both, have push-button advance system. The Core fine lead mechanical pencils provide excellent control and precise writing. With its free ink roller refill the Core Rollerball gildes smoothly across the paper. The force resource windows let you see how much ink you have in reserve. The Core Ballpoints and Roller Balls measure 5" in length. The Fountain pen and Pencil measure 5.5" in length.