... , length:300-1250mm 2.Carbon layer thick: 35mm,50mm High Effective Air Purifier / Air Cleaner Cartridge Filtermatch *Carbon layer thickness: 35mm, 50mm*Color ... ventilation fan, Grow tent, Carbon filter, Light reflector, Electronic Ballast, Heavy duty hanger, Flexible duct... Rope Ratchet FilterHanger High Effective Air Purifier / Air Cleaner ...