This electric fan relay kit is made of , which can withstand use. Features the brass, stainless steel and iron material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. Features -Color:Assorted Color -Material:Brass, stainless steel, iron -Size: 5.60X1.60X1.60cm;/2.20X0.63X0.63in; Voltage: 12V Cable length: about 1m - This is 175 - 185 Fahrenheit degree electric fan thermostat relay kit for cooling system. - Electric engine cooling fan thermostat (3/8 inch thread NPT) fits perfectly with most 7 inch, 10 inch, 12 inch, 14 inch and 16 inch fans. - Includes everything you need to connect the fan, including brass adapters for mounting the sending unit, wires, relay , circuit breakers, terminals, and mounting screws. - Turns the electric fan on at 185 degrees and off at 175 degrees for any 12 volts system. - Simple and delicate, excellent and reliable, carefully crafted, not easy to deform or break due to the high hardness. Package list: 1 x Circuit breaker 1 x relay pin 1 x relay wiring 1 x thermostat 4 x pre-insulated terminals 4 x screws 1 x 30A fuse 2 x blue fan tail connectors 1 x nylon terminal 1 x nylon female terminal