Filters mesh:10mesh to 2400mesh material: stainless steel, copper, brass shape: square ,round, ring ect Features:1 ... The frame can be S.S., aluminum and nickel copper and the filter can be single layer and multi-layer ... series filterGas filter seriesair conditioning filter , deentrainment filterair filter, , range hood filterantisepsis filter, metal frame filter ,plate air filterdraught filter, fan ...