The Proflow II-E filter cartridge uses a PTFE membrane along with high purity polypropylene supports that provide an economical alternative to all-fluoropolymer cartridges. It provides a high degree of retention and cleanliness along with good flow and lifetime. This filter is ideally suited for ultrapure microelectronics fluids. The hydrophobic PTFE membrane can be used as a highly efficient barrier to relieve gas and prevent tank pressure build-up from outgassing chemicals. It is available dry or wet-packed for quick installation and lower extractables.