The classic Pilot FINELINER
An extremely durable writing instrument. With a hard plastic tip, which also makes it suitable for writing through carbon paper, the FINELINER tip is encased in a metal sleeve which will prevent it from splitting and degrading with age. The FINELINER lets you underline, mark, draw and write with the precision, quality and durability you would expect from a Pilot pen.
1.2mm tip gives a 0.4mm line.