... steel, copper ,galvanized round, Rectangular Detailed product description Filter discs Filter discs usaged petroleum, oil refining, chemicals, light ... diameter 0.10mm , diameter 280mm ,quantity 2000pieces Filter discs material mainly produce :AISI302,AISI304,AISI316,AISI309 ... ,nickel chrome alloy (2080)Aluminum , nickel-plated copper Filter discs rangeCircular tape discsD from 44mm ...