6 inch cartridges are installed on Aquapro and compact Culligan reverse osmosis.

Filters are filled with coconut carbon powder or a mixture to retain specific substances.

These smaller models are as effective as large cartridges on-line.

At each end, the thread 1/4 inch to allow to connect a tube 1/4 inch or 3/8 inch depending on the brand of your reverse osmosis.
On our online shop offers the diproclean.com few filters available for drinking water or aquarium.