ThermoFlex Cables (IA002a through IA002d) are designed specifically for high power machines, durability and affordability. Many times, the ThermoFlex cables are cheaper than the older style Water-cooled cables. However, each cable has its place, while the ThermoFlex cables are far more durable and repairable while maintaining their 50' original length, the old style Water cooled coils (IA003 and IA004) can be exposed to far greater ambient temperatures for greater periods of time.