A air purifier replacement filter. The pleats are what do the work – they multiply the surface area so air keeps moving through as the filter loads up.
This is the replacement cartridge for the purifier, not the unit itself. Filterbuy builds more than 600 sizes, so an odd opening is usually a stock item rather than a custom order.
Filterbuy has manufactured pleated air filters in the United States since 2013, at plants in Alabama, Pennsylvania, Texas and Utah. The company grew out of Talladega Machinery & Supply and employs around a thousand people. This filter is made in the USA.
