Genuine Austin Air™ Permafilt Pre-Filter replaces the outer pre-filter that comes with Austin Air™ units. This is the large particle pre-filter that can be seen through the sides of the unit. It lasts for years if maintained and can prolong the life of inner filters.   Package contains one (1) Permafilt Pre-Filter. 

Please select black or white. Because it can be seen through the air cleaner's grille, choose the black pre-filter for black-silver-blue units or the white pre-filter for sandstone-white units.

Please select standard or junior unit size.