BLUONICS 4-Pack 4.5x20 Inch Carbon Block Water Filters – CTO, 5 Micron, Whole House

This is a 4-pack of BLUONICS 4.5-inch by 20-inch carbon block water filter cartridges.

They're CTO filters, which means they're great at reducing chlorine, taste, and odor.

They have a 5-micron rating.

These are standard size 'Big Blue' cartridges and are compatible with many whole house filter housings, not just Bluonics.

They work with brands like iSpring, Aquasana, Culligan, and GE.

They're made of carbon and use carbon block filtration.

Perfect for whole house filtration, well water, or drinking water systems.

They're gray and come in a pack of four.

Keep your home's water clean and fresh with these replacement cartridges.

New in original packaging.