The part I'm speaking of is linked below.
"Effective, easy-to-use RFI fighter. Cut down on RFI (radio frequency interference) with this snap-together Toroid Choke Core. Easily use choke core on a phone, computer, AC, audio and coax cables. No cable cutting necessary - you simply wind it through the core."
http://www.radioshack.com/product/i...58.2032230.2032273&parentPage=family They seemed to have went up a bit in price but I think you get two to the pack now.