15" Alum. 6 Blade Fanmechanical Cooling Fan, 15 In Fan, 6 Blade, 5/8 In Pilot, Universal Bolt Pattern, Steel Hub / Aluminum Blades, Black Paint, Eachdiameter15 Infan Stylerigidblade Quantity6Pilot Diameter5/8 Inrotationstandardbolt Patternuniversalhub Materialsteelhub Colorblackhub Finishpaintblade Materialaluminumblade Colorblackblade Finishpaintquantityeach