PP Membrane pleated filter cartridge has excellent chemical compatibility ,high flow rate, low pressure difference, long life. Specification MaterialPolypropylene Length10",20",30",40" DiameterOuter Dia 69mmInside Dia28mmFilter fineness0.08-0.1/0.22/0.45/0.5/0.6Core materialPolypropylene/Stainless steelEnd caps DOE, -222flat,-222fin,-226flat,-226fin and others