Herbin glaspen 18mm Transparant Lamy the basis of these pens Pen tip:Fine (F) the basis of these pens is completely metal with a high quality finish The pen is equipped with a durable stainless steel nib in medium (M) writing width – ideal for a smooth handmade in the color Coral The spiral grooves on the pen are used to write multiple lines without having to dip the pen back into the inkwell