https://shop.vietphat.com/products/permanent-m-f-al-594x594x22mm-3l
*Panel Filters: Permanent M.F AL 594x594x22mm (3L)
*Media Type: Aluminum
*Frame Material: Aluminum
*Rated Initial Resistance: 18Pa
*Recommended Final Resistance: 250Pa
*Max Operating Temperature: 300ºC
*Size (WxHxD): 24x24x1'' (594x594x22mm)
*Rated Airflow: 3,400CMH