The MAS-E Series Filter Cartridges are Electronic Grade Absolute Rated Membrane Filter Cartridges for Ultra Pure Water Filter Applications. These are made of Polyethersulfone membrane filter cartridges for maximum throughput and service life in microelectronics applications. They have an Absolute retention from 0.03 to 0.65 microns with low extractables, quick rinse up to 18 megohm resistivity. They are flushed and fully integrity tested in Class 10,000 clean room to ensure highest purity and meets applicable CFR criteria and USP Class VI Biological Test for plastic. They are also suitable for steam or autoclave sterilization and hot water or chemical sanitization.