Review on 🔌 REXQualis 120pcs 20cm Breadboard Jumper Wires Dupont Wire Kit - 40pin Male to Female, Male to Male, Female to Female for Arduino, DIY, Raspberry Pi 2 3 by Michael Hudson

I ordered a second set of jumpers because everything I've read about them says they are copper clad aluminum wires, but before the other set arrived I cut the end off one of them, just to take a look I was surprised that the solder worked great. It may have been the same man-man combo to choose from, but I'll take a chance and assume they were all made of the same solid material. In any case, they were inexpensive and did what I needed. I am very happy with my purchase.