It's really hard to tell from the pictures or even RCA's site what this wire is made of. Based on the pictures I am going to say that it is -at best- a stranded copper cable, but potentially (and, likely, at the price) copper clad aluminum (CCA).
This cable connects your computer to a network. Simply plug one end of the cable into your computer and the other end into your modem, network hub, or Ethernet device!
www.menards.com
Will it work? Maybe, but I personally wouldn't risk it - I would find a wire that positively says that it is copper