Hustler Fans by Jones Racing Products, Inc. are engineered to meet the demands of race applications. The Hustler Fans' three blade technology offers a more balanced rotation while keeping the engine cool. The ultra-lightweight pocketed design of the center mounting hub is paired to three durable aluminum blades that are designed to produce extreme air movement thru the radiator while keeping the overall moment of inertia at a minimum. The powder coated finish adds to the overall strength and durability of the design. The 15" Hustler Fan weighs in at just over a pound. The 15" and 17" diameter fans have the benefits needed for use on either dirt or asphalt water pump driven applications. Lightweight black anodized billet aluminum fan spacers are also available in 2", 3" and 4" lengths to ensure the perfect fit and placement, sold separately.