Description Flexalite Aluminum Fans Additional Features: 6 blades these fans pull a lot of air. Rpm Rating for 15″ and 17″ is 8000 and 18″ is 7000 RPM rating Heavy-duty, 27 degree, 6-blade fans, available with aluminum or steel blades, can move the volume of air needed to keep race engines cool. Universal bolt pattern with a 5/8″ pilot hole.
