Mr. Gasket wiring harness & relay kits protect your electrical system and provide reliable and consistent power for your high performance electric fan. These kits include high quality heavy gauge wiring, 30 amp relay, 30 amp circuit breaker, pre-wired relay connector, crimp terminals & hardware. Each kit comes with easy to follow instructions that are written specifically for that application. Features: 30 AMP Relay Wiring Harness is 100 Long - 10-18 Ga. Wire 30 Amp Circuit Breaker 3/8 NPT Temperature Sensor w/ 1/2 NPT Reducer Bushing Crimp Terminals & Hardware Special Connector Allows Additional Relays to be Nested Together for Clean Installation Easy to Follow Instructions Simplify Wiring Your Electric Fan