Is copper bad for the penis?

Hi all,

Awhile back I was using my homemade Power Jelq device, basically I was using 2 copper pipes for the top and bottom of my penis, anyways it worked great, but I'm wondering if copper is bad for the penis, especially if the 2 pipes are used as jelq motion, up and down the penis?

I don't think so...

I wondered that too when i wore the Rop if it was bad copper or the zinc?? I don't know