1. This is a heavy duty universal electric fan wiring kit.
2. This kit includes a waterproof relay, 3/8 inch(or1/2 inch)NPT thermostatic switch (185 degree on / 175 degree off), and fuse block.
3. These are perfect to use to turn your electric cooling fan on and off
4. The 40 Amp relay helps take the load and aids in starting the fan with less Amps.
5. It is a 3/8 inch pipe thread, this kit includes everything you will need to hook up to your fan.