The Fasco 5FR1031-2 replacement fan blade has a 10" diameter with a 33 degree pitch. This fan is for counter clockwise (CW) applications and has 5 blades. This fan blade is a common replacement part found in many homes' HVAC unit. The Fasco 5FR1031-2 is an economical replacement for your HVAC systems and will last a long time. Because this is a popular product, we keep this in stock for fast turnaround. If you order by 2:30 cst during a weekday, your fan will be mailed same day because we understand the importance of getting your HVAC systems back up in running. If you have any questions regarding this fan, feel free to reach out to our motor experts!