Derale 13021  -6AN x -6AN In-Line Fluid Thermostat
With a 180 degree farenheit preset turn-on, 165 degree farenheit turn-off, this -6AN x -6AN fluid control thermostat engages the fan on any remote cooler electric fan so that it comes on only when needed. Brass hose barb fittings included in kit. Maximum 15 amp capacity.