Copper 3d printer nozzles

Hello,

I watched your video " How to pick a 3D printer nozzle and how to install it".
https://www.youtube.com/watch?v=tDq1Du9gaWM

In it you refer to a copper nozzle with a hardened steel insert.
You stated the brand and model of it, sorry, I could not understand what you said.
I lessened repeatedly but you said it too fast for me.

Would you please post a like to it or email me a link.

Thank You

an he also mentioned the manufacturer
https://markforged.com/product/f-pc-2003/