6" HYDROPONIC INLINE EXHAUST AIR CARBON FILTER SCRUBBER GROW SYSTEM SUPPLY 6" Flange Carbon Air Filter For Hydroponics Constructed with 52mm thick carbon layer, it can effectively eliminate odors, filter particulates and purify the air to provide both you and your plants with clean and fresh environment if in conjunct use with 6" vortex blower. Instead of leaving the bottom section unused and wasted, it utilizes 100% of the carbon element. So if you are suffering from stale air condition and tired of gardening with organic fertilizer, sprays, odor gels or even incense, this real activated carbon filter is surely your optimal choice with 18 month life expectancy of continuous use! Features: 6" Flange Activated Carbon Charcoal Filter Maintenance Free Design Safe and Effective Operation Cotton Filter Pad Aprox 17-3/4" Long over all Diameter 8"