Permanent marker for white opaque writing on non-porous materials. Adheres even on rusty metal surfaces. Robust aluminum body, ideal for trade and industry. Plastic cap the same color as the ink.* Chlorine-free.* Stroke width 4mm - Tip width 6.6mm.* Permanent* Rub-resistant* Visible on dark backgrounds* Suitable for: metal, glass, plastic, rubber, wood, stone