FARBER-CASTELL-Creative Studio: Multi-Mark Super Fine Marking Pens with Erasers. These super fine markers have four line widths: 0.4; 0.8; and 1.0mm with high quality nibs that ensure an even flow of ink; gliding gently and smoothly over most surfaces. The vibrant ink is ideally suited for drawing; lettering; fashion sketches and illustrations of all kinds. They also work great in mixed media artwork. Each pen has an eraser attached that can remove the ink from most non-porous surfaces; the ink is permanent on porous materials. Writes on just about any surface: is superior on glass; plastic; metal; wood; and stone. Waterproof; fade resistant; lightfast; and archival quality. Set includes four markers: (2) 0.4mm; (1) 0.8mm; and (1) 1.0mm. All are Black. Imported.