Pentel NMS50 Permanent Marker Bullet Tip 1mm Line Black (Pack 12) - NMS50-APentel Fine Point Permanent Marker NMS50 black is suitable for use on most surfaces in offices and domestic environments. The NMS50 is a low odour permanent marker that does not contain xylene or toluene with a 2mm tip giving approximately 1mm line width. It is also made from 89% recycled plastic with a ventilated safety cap.