1) Materials: stainless wire mesh, phosphor copper wire mesh, brass wire mesh 2) Shape: round, rectangle, oval ... filter components and filters.Features: 1) Materials: stainless wire mesh, phosphor copper wire mesh, brass wire mesh 2) Shape: round, rectangle, ... oval, crescent, semicircle 3) The wrapped brim material: copper coating nickel, aluminum, stainless steel 4) The layers of the ...