Sakura IDenti-Pen is a dual point permanent ink marking pen that gives you a choice of a fine or extra fine nib, with a plastic tip on either end.
Excellent for use on metal, glass, ceramics, rubber, wood, photographs: virtually any surface.
Quick drying, waterproof ink is indelible on porous surfaces, not for use on fabric.
Low odor, xylene-free solvent. IDenti-Pen Carded Black- This pen creates 0.4mm and 1.0mm lines.