Duraflow Filtration Air Filter Foam Roll Media 24″ x 25′ x 1/4″

Foam Air filter, made with open cell foam measures 24″ wide x 25 feet long x 1/4″ Features a untested MERV 4 rating for capturing dust, lint, pollen, pet hair and more. 30PPI fom, means  this is rated at 30 pores per inch, with a rage of 25-35 pores per inch. Washable and reusable or disposable. Has many other uses besides air filtration. Easily cut to size with sharp shears or utility blade.