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Marker Pen
A marker pen, marking pen, felt-tip pen, flow or marker, is a pen which has its own ink-source, and usually a tip made of a porous, pressed fibers such as felt. A typical permanent marker consists of a container (glass, aluminum or plastic) and a core of an absorbent material such as felt. This filling serves as a carrier for the water-proof ink. The upper part of the marker contains the nib that was made in earlier time of a hard felt material, and a cap to prevent the marker from drying out.
