1. new, never been used. 2. 175~185 degree electric fan thermostat relay switch kit, It is a 3/8inch pipe thread. 3. This kit includes everything you'll need to hook up to your fan 4. Comes on at 185 degree and turns off at 175 degree. 5. This kit is set up to turn your electric fan on at 185 degrees and shut off at 175 degrees and will work with any 12 volt system. Fitment: Fits for 265 283 305 307 327 350 383 400 396 402 427 454 472 502 260 289 302 351W 347 352 360 390 406 427 428 429 460 351C 351M 400M 273 318 340 360 361 383 400 413 426W 440 455 330 326 Engines Instructions: Note:For the two red wires,please connect the short red wire to the fan and the long red wire to the battery 1.Mount the relay under the hood in a convenient location as to the fan as possible. 2.Install thermostat into the head or intake manifold.Route the black wire to thermostat and cut to length.Crimp the red terminal onto the black wire and attach to thermostat. 3.Route and connect the red wire to the fan "+" terminal or power wire from the fan motor printed "to electric fan". 4.Mount the circuit breaker provided in a convenient location as close as possible to whichever power source. 5.Neatly route the red wire from the relay to one side circuit breaker installed in step 6.Route the brown wire to the ignition switch or the fan switch whichever is more convenient. Voltage: 12V DC Colour:As shown Material:Plastic + Metal Package Contents: 1 x Fan Temperature Switch 1 x Brass Adapter 1 x Sending Unit Wires 1 x Relay Switch 1 x Circut Breaker 7 x Terminals 3 x Mounting Screws Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.