Designed primarily to replace a factory engine driven radiator fans these electrical GReddy Fans cool the radiator without parasitic drag on the engine. This means more usable power. They are available in push and pull types in various sizes. The dual fan kits also include GReddy's Muti Switching System for total fan control. Depth 57mm, 22.5km/hr, 2920RPM, 12V - 4A.