<b>FEATURE </b> <br>1200+ IAV High Quality Australian Virgin Activated Carbon from Western Australia ,odor removal 99.9% light weight and highly efficient for enclosed environments <br>1.6 mm aluminum tops and bases for reduces weight,Averaging half the weight compare with other filter make it a shiny filter <br>More air flow from larger open custom mesh for extended life,using the entire filter area <br>Inner and outer mesh with 53% open area allows for increased air flow.have an lasting performance <br>Two free pre filters Washable , 1 pair rope ratchet included,Replacement carbon sleeves are available to make them last even longer