... Filter Cartridges 1.ISO9001-2008 certificated 2.304,304 L, 316,316 L stainless steel 3.Filter Cartridges Stainless Steel Filter Cartridges Material: 304,304 L ... , 316,316 L ... , V-shaped , cylindrical, etc., filter cartridge material, the density filter can be customized according to requirements, ...