High Efficient Active Carbon Filter match for Blower 1.Dia:100-315mm, length:300-1250mm 2.Carbon layer thick: 35mm, ... 50mm Activated Charcoal Air Purifier, Air Filter for HVAC systemsHcsino*Carbon layer thickness: 35mm, 50mm*Color available: Black ... all the Greenhouse systems: Inline ventilation fan, Grow tent, Carbon filter, Light reflector, Electronic Ballast, Heavy duty hanger, Flexible duct ...