This Streamline style pen is made with spalted birch. Spalted Birch is a type of birch that has been allowed to begin initial stages of decay. This partial decay – called spalting – gives the wood dark contrasting lines and streaks. The Streamline Pens are slightly smaller than the Mont Blanc style pens. They take cross refills. All pens come gift boxed in a black cardboard box with a description card.