Pentel NMF50 Permanent Marker Superfine Tip 0.3mm Line Black (Pack 12) Pentel Superfine Point Permanent Marker NMF50 black is suitable for accurate work in offices and domestic environments. The NMF50 is a low odour permanent marker that does not contain xylene or toluene and is suitable for everyday use on most surfaces. Super fine tip housed in metal support and ventilated safety cap. Itís ideal for marking in areas where space is limited with its 0.6mm tip which gives approximately a 0.3mm line width