Dial 3440 Filter Media, Rigid, Cellulose, For: UltraCool ADA/ASA 50 and 51, SI500 8 in Single Inlet Coolers

Cellulose base impregnated with plastic resins and anti-rot agents. 50% heavier than paper, holds more water and lasts longer, with high air velocity and fast wet-out. Energy efficient, durable and easy to install.