3 FILTERS- 6′ X 36″ X 20″
4 FILTERS- 7′ X 36″ X 20″
4 FILTERS- 8′ X 36″ X 20″
5 FILTERS- 9′ X 36″ X 20″
6 FILTERS- 10′ X 36″ X 20″
6 FILTERS- 11′ X 36″ X 20″
7 FILTERS- 12′ X 36″ X 20″