The Coil Mate Coil Cleaning Hose, an ideal mate with Nu-Calgon sprayers and coil cleaners in the cleaning of HVAC/R coils! It is a durable, reinforced hose construction with crush proof solid brass wrench fittings and a flex-guard collar that provides added hose protection at the female fittings – an area most susceptible to damage from overuse. The 50 foot length is perfect for coil rinsing needs.