Siamese Cable is much higher quality cable than pre-fabricated plug and play cable. Siamese cable is comprised of RG59 for video transmission and 18 gauge 2 wire for power transmission. Typically Siamese cable should be used for all PTZ cameras and is also recommended for use with higher end Vandal Domes and Box cameras. Our Siamese cable by the foot can be cut to the length you wish and we can even install the connectors for you prior to shipping. We recommend you purchase compression connectors separately and we will install them for you. Just put instructions in the notes section when you check out.
I imagine professional installers have a source for this cable but if you are a do it your selfer I doubt you'll find this at a home improvement or electronics store. Good cable. Saves time running two sets of cable; coax for the video and wires for the power. Use good quality connectors for best performance.