Hastings Filters AF2404 Channel Flow Air Filter Element Fully meets filtration requirements of the application Straight-through air flow pattern reduces the amount of space, up to 50 percent of traditional filters and allows for new installation possibilities Non-metal filter elements allow for easier disposal and are fully incinerable The flat and corrugated media - in either a rolled or stacked format - is inherently strong, eliminating the need for a center tube and wrapper used in traditional air filters Covered by manufacturer's warranty for peace of mind.