Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low View: 12 24 All Quick View Quick View Air PurificationPhat Filter 4″ x 8″ – 150 CFM $94.95 Phat Filter 4" x 8" - 150 CFM Quick View Quick View Air PurificationPhat Pre-Filter – 4in x 8in $7.50 Phat Pre-Filter - 4in x 8in