wheel filter PTFE membrane filter Porex. Filter Papers and Membrane Filters - SOMATCO. MEMBRANE FILTER NYLON PORE SIZE 0.45UM, DIAMETER 47MM, PLAIN 100/PK 1625/2 7404-009 MEMBRANE FILTER NYLON PORE SIZE 0.45UM, DIAMETER 90MM, PLAIN 50/PK 1626 7582-004 Membranes Filter PTFE pore size 0.2 um Dia.