The MARKAL CHINA MARKER 96013 is a special type of writing instrument designed for quickly and easily marking on porous and non-porous surfaces. It is a wax-based marker and is specially formulated for darker, more intense marking on surfaces like corrugated cardboard, wood, clay, metal, glass, and plastic. The china marker features a large strong core of 5.1 mm which is standard in all 96013 model markers, and two lead-free nibs that are made of compressed fibers and wax. The marker is also built with a clip for secure storage and handling, and doesn’t require any special preparation before use.