Sure!
Copper chem is put together by greenpoint seeds using the “kate Upton cut” of stardawg (originally from top dawg seeds) and a clone only authentic cut of chem 4.
Stardawg is already (chem4 X chemd bx3)
So with copper chem you get chem4 X (chem4 X chemd bx3)
So you get a heavy terp, extra potent, chemdog that expresses more like chem4.
I’ve gotten 3 expressions from copper chem while growing and crossing.
1 kerosene and cotton candy/carnations (chem4 Expression)
2 amonia and burnt matches (chem d expression)
3 gasoline/pinesol (chem 4 and chem 91 leaner)
You’ll get a few of each in a pack
IMHO copper is the best intro to chem dog and easily outperforms clone onlies