Parker compatible refill. Black titanium and platinum accents. There are only 13 of these blanks available for assembly on the four styles of pens offered. When they are gone that’s it. Can reconfigure for a left handed writer. Let me know in the comments when purchasing. $40 of the cost of this pen will be donated to Feeding America or the food bank of your choice (let me know in the comments). Note: Unless you are the first buyer, this will not be the pen you receive.