Permanent bright opaque markers for most surfaces, whether semi-porous or non-porous. RNM ink penetrates grease, oil and rust to give a waterproof mark which will withstand many kinds of metal processing. The marker comprises a flexible plastic container with a ball valve writing head. Features and Benefits Permanent bright and opaque ink RNM ink penetrates grease oil and rust for a waterproof mark Withstands metal processing for easy identification Ball valve head for controlled ink flow Typical Applications Metals Rigid plastics Painted surfaces Wood Stone Asphalt Notes Complete with standard 2.5mm ball heads Size: 45ml Please note, colours are for guidance only