24" round XL High Volume filter.

24” filter: X Large High Volume (Fits 24″ outer fan cage-designed for high volume/velocity) Designed for fan motor speeds above 1500CFM

This is the Inventors favorite, because when placed on a fan moving 4,000 CFM you can easily outpace, and contain the rate of contamination.

PRODUCT INFO This filter is triple the capacity of the large, yet just as portable....Very effective in demolition, drywall, sanding, projects with a high dust threat!