One Flex-A-Lite 6-Blade Belt Driven Flex Fan, 17 inches, Silver (2017 / 101567) This radiator cooling fan originates from the 1962 Flex Fan concept, the standard for engine cooling fans, now with a silver coating. 6-Blade belt driven automotive cooling fan moves considerable air at idle and the stainless steel blades flatten out at higher engine RPM to reduce engine drag for better performance and improved fuel economy Stainless steel blades with a premium silver coating that won't degrade or lose luster in the harsh environment of an engine compartment 17" diameter, 6 blade cooling fan for cars, SUVs, and muscle cars