Electric Thermostat Temperature Switch

[profe56]

Ok. I have fans, relay,and circuit breaker but I'm missing the ETS
I saw it on Ebay but I can't place de picture, also I don't know the brand
Electric Thermostat Temperature Switch
It is a 3/8" pipe thread. It activates your fan when the temperature reaches 185 degrees and turns off at approximately 170 degrees. This kit is perfect for any of our 10, 12, 14, and 16 inch fans, as well as our dual fans.
Is this what I need?
I did this question before: do you know the number of the part and may be I could buy it in San Diego at NAPA OR O'reilly.