... 315mm, length:300-1250mm 2.Carbon layer thick: 35mm,50mm High Efficient Active Carbon Air Filter *Carbon layer thickness: 35mm, 50mm*Color ... air through the system. And Housing Material is Galvanised steel & high impact polycarbonate cap. 3. ApplicationIt is used everywhere , including Grow ... Ballast, Heavy duty hanger, Flexible duct... Rope Ratchet Filter Hanger High Efficient Active Carbon Air Filter