... 300-1250mm 2.Carbon layer thick: 35mm, 50mm High Iodine Air Filter for Hydroponics Plant System *Carbon layer thickness: 35mm, ... cleaning.etc.And we suggest you apply air filter together with ventilation fans 4. Specific technical parameter ... , Carbon filter, Light reflector, Electronic Ballast, Heavy duty hanger, Flexible duct... Rope Ratchet Filter Hanger High Iodine Air Filter for Hydroponics Plant ...