Permanent marker (round core) that produces vivid color even when writing on metal, glass, or black paper. Opaque ink writes vividly on black objects Ink Color: Red; Fine Point; Line Width: 0.03 - 0.05 inches (0.8 - 1.2 mm); Ink: Opaque, Oil-based; Material: Shaft: Aluminum; Pen Core: Sliver (Acrylic); Product Size: Art Supplies Shop Dot Com Postcard A; Limited Product! 1 x Cute Animal Postcard