Extension tubes are 48″ long, the same length as the tube that comes with your ChiliPad™.
Extensions are sold individually, and one tube is needed per control unit. So, dual-zone ChiliPads or ChiliBeds will need 2 extension tubes (one per unit).
We recommend purchasing an extension tube(s) if you have an adjustable bed or if you prefer your Chili Control Unit to reside on the far side of your night stands.
We DO NOT recommend using more than one extension tube per unit.