This was a custom build for a customer.
It had to be matte black ED filler and no pocket clip.
This pen is close to a 149 sized pen and will hold a ton of ink.
This material is Delron.
I was at my metal supplier a while back and they were moving some metal around on these black rollers.
I was able to score one from them and when I got the commission on this pen I thought a perfect match.