Field Controls Commerical Water Pool Heater Control Kit For 750 Millivolt CK-81Designed for use with the SWG Series Power Venter for controlling 750 millivolt controlled Natural and LP Gas appliances with a 24AC voltage thermostat or wall switch, such as a gas fireplace. Made in the USA.Includes:Junction box with mounted pressure switch1 ft. length of 1/8 aluminum tubing1/8 tubing connector1/8 tubing to 1/8 NPT elbowFlexible conduit connectorMounted 115 VAC/24 VAC transformerMounted post-purge timer (non-adjustable) Product Specifications BRANDField Controls LENGTH INCHES8 WIDTH INCHES6 HEIGHT INCHES5 WEIGHT LBS5 FUEL TYPENatural and LP Gas FOR USE WITH750 Mv Operated Boilers, Furances, Pool & Spas Heaters INCLUDESDraft Proving Switch, Fixed Post Purge LIMITED WARRANTY YEARS1 MANUFACTURER'S PART NUMBERCK-81