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Hydronix Carbon Filters

Fits 5" Slim Housings

5" x 2.5"

Fits 10" Slim Housings

10" x 2.5"

Fits 20" Slim Blue/White/Black/Clear Housings

20" x 2.5"

Fits 10" Big Blue/White/Black/Clear Housings

10" x 4.5"

Fits 20" Big Blue/White/Black/Clear Housings

20" x 4.5"