Kit Includes all components for electric fan installation: 180°F automatic screw in thermal switch [1/2''-14 NPT], insulated wire, wire connectors, fuse block power taps, in-line fuse holder with 30 Amp fuse, wiring diagrams for single and dual fan installations, and illustrated bilingual instructions. Dual fans require a 30 Amp relay, part number 771-19002, sold separately.