Undersize Filters:  
Filter sizes below are representations.
Not all filter sizes are represented below:
9 X 9, 10 X 10 & 12 X 12


Basically any filter sizes 12 X 12 & under

Regular Filters: 
Filter sizes below are representations.
Not all filter sizes are represented below:
12 X 20, 20 X 20, 20 X 24, 24 X 24,
20 X 30

Basically any filter sizes 20 X 30 and under

Oversize Filters: 
Filter sizes below are representations.
Not all filter sizes are represented below:
14 X 36, 18 X 36, & 24 X 36


Basically any filter sizes over 20 X 30

Undersize Filter
Package 1

Regular Filter
Package 1

Oversize Filter
Package 1

6-month supply
filter media
(6 Filters)  & 
1 Aluminum Frame

Undersize Filter Package 2

Regular Filter
Package 2

Oversized Filter
Package 2