AIR FILTER,TULB:4"(100mm), 5"(125mm), 6"(150mm), 8"(200mm), 10"(250mm), 12"(300mm).Length:300mm,500mm,600mm,800mm,1000mm,1200mm! CARBON AIR FILTER,TULB SIZE:4"(100mm), 5"(125mm), 6"(150mm), 8"(200mm), 10"(250mm), 12"(300mm).Length SIZE:300mm,500mm,600mm,800mm,1000mm,1200mm! CARBON FILTER