Double Layer Membrane Filter is designed for wine filtration as a final filter for cold biological stabilization. The unit combines a pre-filtration and final membrane layer of naturally hydrophilic polyethersulphone (PES) with a mirrored asymmetric pore structure. The pre-filter membrane extends the life of the final layer, producing longer on-stream life. The product is made in a clean room under tightly controlled conditions using components made from non-toxic and biologically inert raw materials. Multiple length cartridges with industry standard adapter styles are made to fit most housing designs and system sizes. All materials are traceable and CFR 21 listed for direct food contact.