Derale 16779 Designed with quality and performance in mind, this High Amperage Fan Controller breaks new ground in the industry of electric fan controllers. 100% USA made, a bulletproof design, 35 amp rating, adjustability from 150°-240°F, and a die cast bright finish aluminium cap, come together to make this fan controller stand out from the crowd. The electric fan is activated at the temperature set by the user, and turn off is pre-set at 15°F below the desired turn-on temperature. Kit comes complete with wiring harness, fusible link, all necessary electrical connectors and push-in style radiator probe. Size Width 2-3/8″ x Length 4-5/8″ x Height 1-9/16″. AC override circuit included. Thread-in 3/8″ Npt radiator probe.