Typically used for either long cable runs of up to 700' or when a durable outdoor cable is required, our RG-59P Siamese cable is Plenum certified and makes installations a snap. Simply run a single cable to your surveillance camera instead of two since our Siamese cable provides power to your camera while delivering video from your camera to your monitor/ recorder. Sold in spools of 1000', you can cut our Siamese cable to custom lengths.